Merge r1619160 from trunk. YARN-2174. Enable HTTPs for the writer REST API of TimelineServer. Contributed by Zhijie Shen

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svn merge -c 1619176 FIXES: YARN-2034. Description for yarn.nodemanager.localizer.cache.target-size-mb is incorrect. Contributed by Chen He


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HDFS-6870. Merge r1619192 from trunk.

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