HADOOP-8562. Fix CHANGES.txt to move 8562 and related tasks to 2.0.5 section

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1486334 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-8562. Moved related jiras to 2.0.5 section in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1486336 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-238-trunk-gd