YARN-1185. Fixed FileSystemRMStateStore to not leave partial files that prevent subsequent ResourceManager recovery. Contributed by Omkar Vinit Joshi.
svn merge --ignore-ancestry -c 1533803 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1533805 13f79535-47bb-0310-9956-ffa450edef68