YARN-630. Changed AMRMProtocol api to throw IOException and YarnRemoteException. Contributed by Xuan Gong.
MAPREDUCE-5226. Handling YarnRemoteException separately from IOException in MR App's use of AMRMProtocol after YARN-630. Contributed by Xuan Gong.
svn merge --ignore-ancestry -c 1480529 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1480530 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-HADOOP-9046-branch-2-gd