YARN-1454. Fixed test failure issue with TestRMRestart. Contributed by Karthik Kambatla.
svn merge --ignore-ancestry -c 1547651 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1547653 13f79535-47bb-0310-9956-ffa450edef68