YARN-1258: Move to 2.2.1 in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534307 13f79535-47bb-0310-9956-ffa450edef68
Reverting "YARN-1258: Move to 2.2.1 in CHANGES.txt" because it contained unintended changes

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534308 13f79535-47bb-0310-9956-ffa450edef68
YARN-1258: Move to 2.2.1 in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534310 13f79535-47bb-0310-9956-ffa450edef68
YARN-1288. Make Fair Scheduler ACLs more user friendly (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1534315 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HDFS-4310-trunk-gd