MAPREDUCE-4737. Ensure that mapreduce APIs are semantically consistent with mapred API w.r.t Mapper.cleanup and Reducer.cleanup; in the sense that cleanup is now called even if there is an error. The old mapred API already ensures that Mapper.close and Reducer.close are invoked during error handling. Note that it is an incompatible change, however end-users can override Mapper.run and Reducer.run to get the old (inconsistent) behaviour. Contributed by Arun C. Murthy.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1471556 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4339. Add the missed entry CHANGES.txt from r1465835

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1471595 13f79535-47bb-0310-9956-ffa450edef68
YARN-605. Fix failing unit test in TestNMWebServices when versionInfo has parantheses like when running on a git checkout. Contributed by Hitesh Shah.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1471608 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-271-trunk-gd