YARN-2949. Add documentation for CGroups. (Contributed by Varun Vasudev)
(cherry picked from commit 389f881d423c1f7c2bb90ff521e59eb8c7d26214)
HADOOP-11125. Remove redundant tests in TestOsSecureRandom. Contributed by Masanori Oyama.
HDFS-7373. Clean up temporary files after fsimage transfer failures. Contributed by Kihwal Lee
(cherry picked from commit c0d666c74e9ea76564a2458c6c0a78ae7afa9fea)
HADOOP-11427. ChunkedArrayList: fix removal via iterator and implement get (cmccabe)
(cherry picked from commit 07619aa516deb9094a18e0c64ce66ff9c8b05e92)
HDFS-7543. Avoid path resolution when getting FileStatus for audit logs. Contributed by Haohui Mai.
HADOOP-11385. Prevent cross site scripting attack on JMXJSONServlet. Contributed by Haohui Mai.
HADOOP-11409. FileContext.getFileContext can stack overflow if default fs misconfigured. Contributed by Gera Shegalov
(cherry picked from commit b9d49761f72078a0a83137ba8197d08b71f385e0)
HADOOP-11428. Remove obsolete reference to Cygwin in BUILDING.txt. Contributed by Arpit Agarwal.
HDFS-7530. Allow renaming of encryption zone roots. Contributed by Charles Lamb.

(cherry picked from commit b0b9084433d5e80131429e6e76858b099deb2dda)
HDFS-7431. log message for InvalidMagicNumberException may be incorrect. Contributed by Yi Liu.

(cherry picked from commit 5df7ecb33ab24de903f0fd98e2a055164874def5)
YARN-2964. RM prematurely cancels tokens for jobs that submit jobs (oozie). Contributed by Jian He
(cherry picked from commit 0402bada1989258ecbfdc437cb339322a1f55a97)
HADOOP-11431. Clean up redundant maven-site-plugin configuration. Contributed by Herve	Boutemy.
HADOOP-11430. Add GenericTestUtils#disableLog, GenericTestUtils#setLogLevel (cmccabe)
(cherry picked from commit 6635ccd21766faf8f6a15d937dc8919a9075c988)
Merge remote-tracking branch 'remotes/origin/branch-2' into branch-2