svn merge -c 1570631 FIXES: MAPREDUCE-5688. TestStagingCleanup fails intermittently with JDK7. Contributed by Mit Desai


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1577585 13f79535-47bb-0310-9956-ffa450edef68