YARN-962. Fixed bug in application-history proto file and renamed it be just a client proto file. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/YARN-321@1506401 13f79535-47bb-0310-9956-ffa450edef68
YARN-947. Implementing the data objects to be used by the History reader and writer interfaces. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/YARN-321@1506403 13f79535-47bb-0310-9956-ffa450edef68