HADOOP-11271. Use Time.monotonicNow() in Shell.java instead of Time.now() (Contributed by Vinayakumar B)

(cherry picked from commit 8e9502e05d09e31b76fda7cc6691e78a39db8de6)
HADOOP-11265. Credential and Key Shell Commands not available on Windows. Contributed by Larry McCay.

(cherry picked from commit a7fbd4e633c18aeeda93c0f013c0a1fcd5963556)
HDFS-7335. Redundant checkOperation() in FSN.analyzeFileState(). Contributed by Milan Desai.
HDFS-7333. Improve logging in Storage.tryLock(). Contributed by Konstantin Shvachko.
HDFS-7199. DFSOutputStream should not silently drop data if DataStreamer crashes with an unchecked exception (rushabhs via cmccabe)
(cherry picked from commit 56257fab1d5a7f66bebd9149c7df0436c0a57adb)
CHANGES.txt.  Move HDFS-7199 to branch-2.6
YARN-2767. Added a test case to verify that http static user cannot kill or submit apps in the secure mode. Contributed by Varun Vasudev.

(cherry picked from commit 7a4c92a9d55fcecef066053ac30dff0fcd4ec90c)
HADOOP-11266. Remove no longer supported activation properties for packaging from pom. Contributed by Masatake Iwasaki.
HADOOP-11267. TestSecurityUtil fails when run with JDK8 because of empty principal names. Contributed by Stephen Chu.
HDFS-7359. NameNode in secured HA cluster fails to start if dfs.namenode.secondary.http-address cannot be interpreted as a network address. Contributed by Chris Nauroth.

(cherry picked from commit ba1d4ad25b301f7247f3f23df15e7f800e50feed)
YARN-2805. Fixed ResourceManager to load HA configs correctly before kerberos login. Contributed by Wangda Tan.

(cherry picked from commit 834e931d8efe4d806347b266e7e62929ce05389b)
YARN-2579. Fixed a deadlock issue when EmbeddedElectorService and FatalEventDispatcher try to transition RM to StandBy at the same time. Contributed by Rohith Sharmaks
(cherry picked from commit 395275af8622c780b9071c243422b0780e096202)
HADOOP-10714. AmazonS3Client.deleteObjects() need to be limited to 1000 entries per call. Contributed by Juan Yu.
(cherry picked from commit 6ba52d88ec11444cbac946ffadbc645acd0657de)
HADOOP-11272. Allow ZKSignerSecretProvider and ZKDelegationTokenSecretManager to use the same curator client. Contributed by Arun Suresh.
(cherry picked from commit 8a261e68e4177b47be01ceae7310ea56aeb7ca38)
HDFS-7366. BlockInfo should take replication as an short in the constructor. Contributed by Li Lu.
HADOOP-11187 NameNode - KMS communication fails after a long period of inactivity. Contributed by Arun Suresh.
(cherry picked from commit d593035d50e9997f31ddd67275b6e68504f9ca3c)
YARN-2813. Fixed NPE from MemoryTimelineStore.getDomains. Contributed by Zhijie Shen
HDFS-7361. TestCheckpoint fails after change of log message related to locking violation. Contributed by Konstantin Shvachko.
HDFS-7367. HDFS short-circuit read cannot negotiate shared memory slot and file descriptors when SASL is enabled on DataTransferProtocol. Contributed by Chris Nauroth.
YARN-2812. TestApplicationHistoryServer is likely to fail on less powerful machine. Contributed by Zhijie Shen

(cherry picked from commit b0b52c4e11336ca2ad6a02d64c0b5d5a8f1339ae)