Move HDFS-5495 to 2.3.0 in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1540917 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-1176. FixedLengthInputFormat and FixedLengthRecordReader (Mariappan Asokan and BitsOfInfo via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1540931 13f79535-47bb-0310-9956-ffa450edef68
YARN-1400. yarn.cmd uses HADOOP_RESOURCEMANAGER_OPTS. Should be YARN_RESOURCEMANAGER_OPTS. Contributed by Raja Aluri.

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Merge remote branch 'origin/trunk' into trunk-gd