MAPREDUCE-5844. Add a configurable delay to reducer-preemption. (Maysam Yabandeh via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603957 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6492. Support create-time xattrs and atomically setting multiple xattrs. (wang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603971 13f79535-47bb-0310-9956-ffa450edef68
Move HDFS-6375 down to 2.5 section in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1603974 13f79535-47bb-0310-9956-ffa450edef68