MAPREDUCE-5585. TestCopyCommitter#testNoCommitAction Fails on JDK7 (jeagles)

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HADOOP-9897. Merging change r1532880 from trunk to branch-2.

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MAPREDUCE-5586. TestCopyMapper#testCopyFailOnBlockSizeDifference fails when run from hadoop-tools/hadoop-distcp directory (jeagles)

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HDFS-5370. Merge 1532899 from trunk

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HADOOP-10005. Merge 1532907 from trunk

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svn merge -c 1532915 Merging from trunk to branch-2 to fix HDFS-5346.

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HADOOP-9078. enhance unit-test coverage of class org.apache.hadoop.fs.FileContext (Ivan A. Veselovsky via jeagles)

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Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-YAHOO-270-branch-2-gd