MAPREDUCE-5310. MRAM should not normalize allocation request capabilities. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493211 13f79535-47bb-0310-9956-ffa450edef68
YARN-789. Enable zero capabilities resource requests in fair scheduler. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493220 13f79535-47bb-0310-9956-ffa450edef68
HDFS-3934. duplicative dfs_hosts entries handled wrong (all files) (cmccabe)



git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493234 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9646. Inconsistent exception specifications in FileUtils#chmod (Colin Patrick McCabe)



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Add missing file for HDFS-3934 (cmccabe)



git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493249 13f79535-47bb-0310-9956-ffa450edef68
revert HADOOP-9646 to fix hadoop-streaming compile issue



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Merge remote branch 'origin/branch-2' into branch-2-gd