MAPREDUCE-5367. Local jobs all use same local working directory (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1510610 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5061. Make FSNameSystem#auditLoggers an unmodifiable list. Contributed by Arpit Agarwal.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1510611 13f79535-47bb-0310-9956-ffa450edef68
move HDFS-4659,HDFS-4762,HDFS-4948 to the right section in hadoop-hdfs/CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1510658 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-253-trunk-gd