HADOOP-10312 Shell.ExitCodeException to have more useful toString

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HADOOP-9361: Strictly define FileSystem APIs

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HADOOP-9361: Strictly define FileSystem APIs - HDFS portion

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HADOOP-9361: Strictly define FileSystem APIs - OpenStack portion

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HADOOP-9361: Strictly define FileSystem APIs - OpenStack portion

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HADOOP-9361: site and gitignore

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HADOOP-9361: changes.txt

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HADOOP-10312 changes.text updated in wrong place

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YARN-2242. Improve exception information on AM launch crashes. (Contributed by Li Lu)

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HDFS-6620. Snapshot docs should specify about preserve options with cp command. Contributed by Stephen Chu.

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HDFS-6613. Improve logging in caching classes. (wang)

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HDFS-6493. Change dfs.namenode.startup.delay.block.deletion to second instead of millisecond. Contributed by Juan Yu.

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HDFS-6511. BlockManager#computeInvalidateWork() could do nothing. Contributed by Juan Yu.

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YARN-2248. Implement application movement between queues in CapacityScheduler