HADOOP-9614. smart-test-patch.sh hangs for new version of patch (2.7.1) (Ravi Prakash via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489153 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1489187 from trunk to branch-2 to fix MAPREDUCE-5220. Fix backward incompatibility for TaskCompletionEvent by adding back setTaskID. Contributed by Zhijie Shen.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489188 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1489219 from trunk to branch-2 to fix MAPREDUCE-5296. Fix backward incompatibility for JobControl by adding the omitted addJob. Contributed by Zhijie Shen.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489220 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd