Merge -c 1493623 from trunk to branch-2 to fix YARN-387. Renamed YARN protocols for consistency. Contributed by Vinod K V.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493624 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1493626 from trunk to branch-2 to fix YARN-831. Removed minimum resource from GetNewApplicationResponse as a follow-up to YARN-787. Contributed Jian He.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493627 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1493631 from trunk to branch-2 to fix YARN-824. Added static factory methods to hadoop-yarn-client interfaces. Contributed by Jian He.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493632 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-MAPREDUCE-4884-branch-2-gd