svn merge -c 1428482 FIXES: MAPREDUCE-4279. getClusterStatus() fails with null pointer exception when running jobs in local mode (Devaraj K via bobby)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1428489 13f79535-47bb-0310-9956-ffa450edef68
merge YARN-103 from trunk. Add a yarn AM-RM client module. Contributed by Bikas Saha.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1428555 13f79535-47bb-0310-9956-ffa450edef68