MAPREDUCE-5187. Merging change r1500929 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1500930 13f79535-47bb-0310-9956-ffa450edef68
YARN-791. Changed RM APIs and web-services related to nodes to ensure that both are consistent with each other. Contributed by Sandy Ryza.
svn merge --ignore-ancestry -c 1500994 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1500995 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4841. FsShell commands using secure webhfds fail ClientFinalizer shutdown hook. (rkanter via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1501006 13f79535-47bb-0310-9956-ffa450edef68
YARN-894. Merging change r1501016 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1501020 13f79535-47bb-0310-9956-ffa450edef68