HADOOP-10273. Update CHANGES.txt to reflect new target version is 2.3

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565453 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5744. Job hangs because RMContainerAllocator.preemptReduce() violates the comparator contract (Gera Shegalov via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565478 13f79535-47bb-0310-9956-ffa450edef68
YARN-1689. Made RMAppAttempt get killed when RMApp is at ACCEPTED. Contributed by Vinod Kumar Vavilapalli.


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HDFS-5807. TestBalancerWithNodeGroup.testBalancerWithNodeGroup fails intermittently. Contributed by Chen He.

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HADOOP-10330. TestFrameDecoder fails if it cannot bind port 12345.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565507 13f79535-47bb-0310-9956-ffa450edef68
YARN-1665. Simplify the configuration of RM HA by having better default values. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565517 13f79535-47bb-0310-9956-ffa450edef68
YARN-1660. Simplified the RM HA configuration to accept and be able to simply depend just on
configuration properties of the form yarn.resourcemanager.hostname.RMID and use the default
ports for all service addresses. Contributed by Xuan Gong.


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