svn merge -c 1506154 FIXES: MAPREDUCE-5317. Stale files left behind for failed jobs. Contributed by Ravi Prakash


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1-beta@1509494 13f79535-47bb-0310-9956-ffa450edef68