HDFS-7201. Fix typos in hdfs-default.xml. Contributed by Dawson Choong.
YARN-2656. Made RM web services authentication filter support proxy user. Contributed by Varun Vasudev and Zhijie Shen.

(cherry picked from commit 1220bb72d452521c6f09cebe1dd77341054ee9dd)
HDFS-7190. Bad use of Preconditions in startFileInternal(). Contributed by Dawson Choong.
MAPREDUCE-5873. Shuffle bandwidth computation includes time spent waiting for maps. Contributed by Siqi Li
(cherry picked from commit b9edad64034a9c8a121ec2b37792c190ba561e26)
YARN-2689 TestSecureRMRegistryOperations failing on windows: more testing
YARN-2689 TestSecureRMRegistryOperations failing on windows: more testing
YARN-2689 TestSecureRMRegistryOperations failing on windows: more testing
YARN-2689 TestSecureRMRegistryOperations failing on windows: jaas entries have debug=true
YARN-2689 move client.logout to a finally clause in a TestSecureLogins test
YARN-2689 need to convert or double escape \ entries in a windows path in JAAS.conf
YARN-2689 need to convert or double escape \ entries in a windows path in JAAS.conf
YARN-2689 include security connection diagnostics on an auth failure
YARN-2689 improve security connection diagnostics