HDFS-4866. Merging change r1493300 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493301 13f79535-47bb-0310-9956-ffa450edef68
YARN-821. Renamed setFinishApplicationStatus to setFinalApplicationStatus in FinishApplicationMasterRequest for consistency. Contributed by Jian He.
svn merge --ignore-ancestry -c 1493315 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493316 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-MAPREDUCE-4884-branch-2-gd