HADOOP-10950. rework heap management vars (John Smith via aw)
HADOOP-6590. Add a username check for hadoop sub-commands (John Smith via aw)
YARN-2437. start-yarn.sh/stop-yarn should give info (Varun Saxena via aw)
HADOOP-11386. Replace \n by %n in format hadoop-common format strings. Contributed by Li Lu.
HDFS-5578. [JDK8] Fix Javadoc errors caused by incorrect or illegal tags in doc comments. Contributed by Andrew Purtell.
HDFS-7475. Make TestLazyPersistFiles#testLazyPersistBlocksAreSaved deterministic. (Contributed by Xiaoyu Yao)