HDFS-7365. Remove hdfs.server.blockmanagement.MutableBlockCollection. Contributed by Li Lu.
MAPREDUCE-5958. Wrong reduce task progress if map output is compressed. Contributed by Emilio Coppa and Jason Lowe.
(cherry picked from commit 8f701ae07a0b1dc70b8e1eb8d4a5c35c0a1e76da)
HADOOP-11274. ConcurrentModificationException in Configuration Copy Constructor. Contributed by Junping Du.
YARN-2744. Fixed CapacityScheduler to validate node-labels correctly against queues. Contributed by Wangda Tan.

(cherry picked from commit a3839a9fbfb8eec396b9bf85472d25e0ffc3aab2)
HDFS-7364. Balancer always shows zero Bytes Already Moved. Contributed by Tsz Wo Nicholas Sze.

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/NameNodeConnector.java
Revert "HADOOP-11274. ConcurrentModificationException in Configuration Copy Constructor. Contributed by Junping Du."

This reverts commit 16b34824673f5a50d464727b8fad98470e5e984a.