MAPREDUCE-6169. MergeQueue should release reference to the current item from key and value at the end of the iteration to save memory. (Zhihai Xu via kasha)
HDFS-7415. Move FSNameSystem.resolvePath() to FSDirectory. Contributed by Haohui Mai.
YARN-2375. Allow enabling/disabling timeline server per framework. (Mit Desai via jeagles)