YARN-513. Create common proxy client for communicating with RM (Xuan Gong & Jian He via bikas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1503933 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5398. MR changes for YARN-513 (Jian He via bikas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1503934 13f79535-47bb-0310-9956-ffa450edef68
YARN-661. Fixed NM to cleanup users' local directories correctly when starting up. Contributed by Omkar Vinit Joshi.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1503942 13f79535-47bb-0310-9956-ffa450edef68
YARN-820. Fixed an invalid state transition in NodeManager caused by failing resource localization. Contributed by Mayank Bansal.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1503947 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9734. Common protobuf definitions for GetUserMappingsProtocol, RefreshAuthorizationPolicyProtocol and RefreshUserMappingsProtocol. Contributed by Jason Lowe


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1503954 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-226-trunk-gd