Move jiras to the right section in CHANGES.txt and make it consistent with branch-2

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1494429 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4917. Start-dfs.sh cannot pass the parameters correctly. Contributed by Fengdong Yu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1494433 13f79535-47bb-0310-9956-ffa450edef68
YARN-553. Replaced YarnClient.getNewApplication with YarnClient.createApplication which provides a directly usable ApplicationSubmissionContext to simplify the api. Contributed by Karthik Kambatla.

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