YARN-953. Changed ResourceManager to start writing history data. Contributed by Zhijie Shen.
svn merge --ignore-ancestry -c 1556738 ../YARN-321


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1562192 13f79535-47bb-0310-9956-ffa450edef68
YARN-1266. Implemented PB service and client wrappers for ApplicationHistoryProtocol. Contributed by Mayank Bansal.
svn merge --ignore-ancestry -c 1556739 ../YARN-321


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1562193 13f79535-47bb-0310-9956-ffa450edef68