svn merge -c 1441239 FIXES: YARN-364. AggregatedLogDeletionService can take too long to delete logs. Contributed by Jason Lowe


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1441246 13f79535-47bb-0310-9956-ffa450edef68