HDFS-5342. Provide more information in the FSNamesystem JMX interfaces. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1532090 13f79535-47bb-0310-9956-ffa450edef68
YARN-1259. In Fair Scheduler web UI, queue num pending and num active apps switched. (Robert Kanter via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1532094 13f79535-47bb-0310-9956-ffa450edef68
YARN-1182. MiniYARNCluster creates and inits the RM/NM only on start() (Karthik Kambatla via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1532109 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HDFS-4312-trunk-gd