YARN-2274. FairScheduler: Add debug information about cluster capacity, availability and reservations. (kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1610542 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6378. Merging change r1610543 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1610545 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6678. Merging change r1610549 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1610551 13f79535-47bb-0310-9956-ffa450edef68
YARN-2260. Fixed ResourceManager's RMNode to correctly remember containers when nodes resync during work-preserving RM restart. Contributed by Jian He.
svn merge --ignore-ancestry -c 1610557 ../../trunk/


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