Renamed releases. 2.2.1 -> 2.3.0 & 2.3.0 -> 2.4.0

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1547136 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5640. Rename TestLineRecordReader in jobclient module (Jason Lowe via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1547149 13f79535-47bb-0310-9956-ffa450edef68
Add ACL check to JHS web-services.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1547159 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5557. Write pipeline recovery for the last packet in the block may cause rejection of valid replicas. Contributed by Kihwal Lee.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1547173 13f79535-47bb-0310-9956-ffa450edef68
YARN-1318. Promoted AdminService to an Always-On service and merged it into RMHAProtocolService. Contributed by Karthik Kambatla.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1547212 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5560. Trash configuration log statements prints incorrect units. Contributed by Josh Elser.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1547266 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch: upstream/trunk