Refactoring lambdas (deeplearning4j#10202)

Refactoring ndarray operators to make them less error prone
More conversion of ndarray references to pointers
Add scalar ops smoke tests

Author: agibsonccc

codegen/op-codegen/pom.xml

@@ -218,59 +218,6 @@
                 </executions>
             </plugin>
 
-            <plugin>
-                <groupId>org.jetbrains.kotlin</groupId>
-                <artifactId>kotlin-maven-plugin</artifactId>
-                <version>${kotlin.version}</version>
-                <configuration>
-                    <args>
-                        <arg>-Xjsr305=strict</arg>
-                    </args>
-                    <compilerPlugins>
-                        <plugin>spring</plugin>
-                        <plugin>jpa</plugin>
-                    </compilerPlugins>
-                </configuration>
-                <dependencies>
-                    <dependency>
-                        <groupId>org.jetbrains.kotlin</groupId>
-                        <artifactId>kotlin-maven-allopen</artifactId>
-                        <version>${kotlin.version}</version>
-                    </dependency>
-                    <dependency>
-                        <groupId>org.jetbrains.kotlin</groupId>
-                        <artifactId>kotlin-maven-noarg</artifactId>
-                        <version>${kotlin.version}</version>
-                    </dependency>
-                </dependencies>
-                <executions>
-                    <execution>
-                        <id>compile</id>
-                        <goals> <goal>compile</goal> </goals>
-                        <configuration>
-                            <sourceDirs>
-                                <sourceDir>${project.basedir}/src/main/stubs</sourceDir>
-                                <sourceDir>${project.basedir}/src/main/kotlin</sourceDir>
-                                <sourceDir>${project.basedir}/src/main/java</sourceDir>
-                                <sourceDir>${project.basedir}/src/main/ops</sourceDir>
-                            </sourceDirs>
-                        </configuration>
-                    </execution>
-                    <execution>
-                        <id>test-compile</id>
-                        <goals> <goal>test-compile</goal> </goals>
-                        <configuration>
-                            <sourceDirs>
-                                <sourceDir>${project.basedir}/src/test/stubs</sourceDir>
-                                <sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
-                                <sourceDir>${project.basedir}/src/test/java</sourceDir>
-                                <sourceDir>${project.basedir}/src/test/ops</sourceDir>
-                            </sourceDirs>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-
             <!-- https://kotlinlang.org/docs/reference/using-maven.html -->
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>