HADOOP-9770. Merge 1507414 from trunk.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1507416 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9507. Merging change r1507429 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1507431 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1507486 FIXES: MAPREDUCE-5419. TestSlive is getting FileNotFound Exception. Contributed by Robert Parker


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1507487 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