[chores] Fix copyright notice header of several recent files

Most files were missing the header altogether. Introduced header in
that case was manually edited to include the proper start year at which
each class was created.

reactor/util/concurrent/MpscLinkedQueue.java had a notice between the
copyright notice block and the package statement, which could get erased
by spotlessApply, so it was moved next to class javadoc.

A few changed classes here deal with deleting duplicated copyright
notice blocks.

See reactor/reactor#682.

reactor-core/src/blockHoundTest/java/reactor/core/scheduler/ReactorBlockHoundIntegrationSPITest.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2019-2021 VMware Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package reactor.core.scheduler;
 
 import java.util.ServiceLoader;

reactor-core/src/jcstress/java/reactor/core/publisher/MonoDelayStressTest.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2021 VMware Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package reactor.core.publisher;
 
 import org.openjdk.jcstress.annotations.Actor;

reactor-core/src/jcstress/java/reactor/core/publisher/MonoInnerProducerBaseStressTest.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2021 VMware Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package reactor.core.publisher;
 
 import org.openjdk.jcstress.annotations.Actor;

reactor-core/src/main/java/reactor/core/publisher/FluxErrorSupplied.java

@@ -14,22 +14,6 @@
  * limitations under the License.
  */
 
-/*
- * Copyright (c) 2011-2021 VMware Inc. or its affiliates, All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *   https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package reactor.core.publisher;
 
 import java.util.Objects;

reactor-core/src/main/java/reactor/core/publisher/FluxIndexFuseable.java

@@ -14,22 +14,6 @@
  * limitations under the License.
  */
 
-/*
- * Copyright (c) 2011-2021 VMware Inc. or its affiliates, All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *   https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package reactor.core.publisher;
 
 import java.util.Objects;

reactor-core/src/main/java/reactor/core/publisher/FluxLiftFuseable.java

@@ -14,21 +14,6 @@
  * limitations under the License.
  */
 
-/*
- * Copyright (c) 2011-2021 VMware Inc. or its affiliates, All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *   https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 package reactor.core.publisher;
 
 import java.util.Objects;

reactor-core/src/main/java/reactor/core/publisher/MonoErrorSupplied.java

@@ -14,21 +14,6 @@
  * limitations under the License.
  */
 
-/*
- * Copyright (c) 2011-2021 VMware Inc. or its affiliates, All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *   https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 package reactor.core.publisher;
 
 import java.time.Duration;

reactor-core/src/main/java/reactor/core/scheduler/DelegatingScheduledExecutorService.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2020-2021 VMware Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package reactor.core.scheduler;
 
 import java.util.Collection;

reactor-core/src/main/java/reactor/core/scheduler/EmptyCompositeDisposable.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2017-2021 VMware Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package reactor.core.scheduler;
 
 import reactor.core.Disposable;

reactor-core/src/main/java/reactor/util/concurrent/MpscLinkedQueue.java

@@ -14,10 +14,6 @@
  * limitations under the License.
  */
 
-/*
- * The code was inspired by the similarly named JCTools class:
- * https://github.com/JCTools/JCTools/blob/master/jctools-core/src/main/java/org/jctools/queues/atomic
- */
 package reactor.util.concurrent;
 
 import java.util.AbstractQueue;
@@ -28,6 +24,10 @@
 
 import reactor.util.annotation.Nullable;
 
+/*
+ * The code was inspired by the similarly named JCTools class:
+ * https://github.com/JCTools/JCTools/blob/master/jctools-core/src/main/java/org/jctools/queues/atomic
+ */
 /**
  * A multi-producer single consumer unbounded queue.
  * @param <E> the contained value type

reactor-core/src/tckTest/java/reactor/core/publisher/tck/FluxSwitchOnFirstVerification.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2018-2021 VMware Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package reactor.core.publisher.tck;
 
 import org.reactivestreams.Publisher;

reactor-core/src/test/java/reactor/core/publisher/MonoSingleMonoTest.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2017-2021 VMware Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package reactor.core.publisher;
 
 import java.util.NoSuchElementException;

reactor-core/src/test/java/reactor/util/concurrent/MpscLinkedQueueTest.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2018-2021 VMware Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package reactor.util.concurrent;
 
 import java.util.concurrent.atomic.AtomicInteger;

reactor-core/src/test/java/reactor/util/concurrent/SpscArrayQueueTest.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2018-2021 VMware Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package reactor.util.concurrent;
 
 import java.util.Arrays;

reactor-core/src/withMicrometerTest/java/reactor/core/scheduler/SchedulersMetricsTest.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) 2018-2021 VMware Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package reactor.core.scheduler;
 
 import java.util.concurrent.Executors;