Remove unnecessary final modifier in PlanExecutor.loadExecutorClass m…

…ethod

Remove unnecessary final modifier in PlanExecutor.loadExecutorClass private static method because private means you can not override this method.

Author: Henry Saputra <[email protected]>

Closes apache#163 from hsaputra/remove_unneeded_final_privatetatsic_planexecutor and squashes the following commits:

fe7afc7 [Henry Saputra] Remove unnecessary final modifier in PlanExecutor's private static method.

flink-core/src/main/java/org/apache/flink/api/common/PlanExecutor.java

@@ -101,7 +101,7 @@ public static PlanExecutor createRemoteExecutor(String hostname, int port, Strin
  }
  }
 
- private static final Class<? extends PlanExecutor> loadExecutorClass(String className) {
+ private static Class<? extends PlanExecutor> loadExecutorClass(String className) {
  try {
  Class<?> leClass = Class.forName(className);
  return leClass.asSubclass(PlanExecutor.class);