Fix double counting of task completions. (llu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-279@1140908 13f79535-47bb-0310-9956-ffa450edef68

mapreduce/mr-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/job/impl/TaskImpl.java

@@ -432,17 +432,6 @@ public abstract class TaskImpl implements Task, EventHandler<TaskEvent> {
     if (getState() == TaskState.RUNNING) {
       metrics.endRunningTask(this);
     }
-    switch (finalState) {
-      case FAILED:
-        metrics.failedTask(this);
-        break;
-      case KILLED:
-        metrics.killedTask(this);
-        break;
-      case SUCCEEDED:
-        metrics.completedTask(this);
-        break;
-    }
     return finalState;
   }