Combine CHANGES.HDFS-2802.txt to CHANGES.txt.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1480840 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4810. several HDFS HA tests have timeouts that are too short. Contributed by Chris Nauroth.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1480841 13f79535-47bb-0310-9956-ffa450edef68