Adding 2.0.5-alpha release to CHANGES.txt files of trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1488587 13f79535-47bb-0310-9956-ffa450edef68
YARN-717. Put object creation factories for Token in the class itself and remove useless derivations for specific tokens. Contributed by Jian He.
MAPREDUCE-5289. Updated MR App to use Token directly after YARN-717. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1488616 13f79535-47bb-0310-9956-ffa450edef68
YARN-733. Fixed TestNMClient from failing occasionally. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1488618 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5229. Put back FileOutputCommitter.TEMP_DIR_NAME in mapreduce for binary compatibility with 1.x APIs. Contributed by Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1488621 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5274. Bring back SecureShuffleUtils.toHex in mapreduce for binary compatibility with 1.x APIs. Contributed by Mayank Bansal.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1488625 13f79535-47bb-0310-9956-ffa450edef68
Move HDFS-4826 to 2.1.0-beta.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1488630 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd