Revert change 1503506 for MAPREDUCE-5317. Stale files left behind for failed jobs


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1503751 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-0.23' into branch-0.23-gd
Merge remote branch 'origin/branch-0.23-gd' into fb-YAHOO-234-branch-0.23-gd