YARN-1389. Made ApplicationClientProtocol and ApplicationHistoryProtocol expose analogous getApplication(s)/Attempt(s)/Container(s) APIs. Contributed by Mayank Bansal.
svn merge --ignore-ancestry -c 1577052 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1577053 13f79535-47bb-0310-9956-ffa450edef68