Merge -c r1469059 from trunk to branch-2 for YARN-514. Delayed store operations should not result in RM unavailability for app submission (Zhijie Shen via bikas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1469062 13f79535-47bb-0310-9956-ffa450edef68