YARN-2054. Better defaults for YARN ZK configs for retries and retry-inteval when HA is enabled. (kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1598632 13f79535-47bb-0310-9956-ffa450edef68
YARN-2010. Document yarn.resourcemanager.zk-auth and its scope. (Robert Kanter via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1598637 13f79535-47bb-0310-9956-ffa450edef68
Merge r1598640 from trunk: YARN-1338. Recover localized resource cache state upon nodemanager restart (Contributed by Jason Lowe)

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HDFS-6404. HttpFS should use a 000 umask for mkdir and create operations. (yoderme via tucu)

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YARN-1868. Merging change r1598686 from trunk to branch-2.

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HDFS-6472. Merged from r1598746. fix typo in webapps/hdfs/explorer.js. Contributed by Juan Yu.

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