Merge -c 1512081 from trunk to branch-2.1.0-beta to fix YARN-1043. Push all metrics consistently. Contributed by Jian He.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1.0-beta@1512085 13f79535-47bb-0310-9956-ffa450edef68