Copyright and test clean up

Author: coffeys

src/java.base/share/classes/java/util/zip/ZipOutputStream.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1996, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it

src/jdk.jartool/share/classes/jdk/security/jarsigner/JarSigner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it

test/jdk/sun/security/tools/jarsigner/SymLinkTest.java

@@ -45,7 +45,7 @@ public class SymLinkTest {
             "protected by the signature.";
 
     public static void main(String[] args) throws Exception {
-
+        Files.deleteIfExists(Paths.get(ZIPFILENAME));
         try (FileOutputStream fos = new FileOutputStream(ZIPFILENAME)) {
             fos.write(ZIPBYTES);
         }