HADOOP-10607. Create an API to separate credentials/password storage from 
applications. (Larry McCay via omalley)


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HADOOP-10607 Forgot the CHANGES.txt.


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HDFS-6478. Merge r1611410 from trunk.

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HADOOP-10732. Fix locking in credential update. (Ted Yu via omalley)


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HADOOP-10733. Fix potential null dereference in CredShell. (Ted Yu via
omalley)


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HADOOP-10591. Compression codecs must used pooled direct buffers or deallocate direct buffers when stream is closed (cmccabe)

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Merge r1611434 from trunk. MAPREDUCE-5910. Make MR AM resync with RM in case of work-preserving RM-restart. Contributed by Rohith

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Merged revision(s) 1611441 from hadoop/common/trunk:
HDFS-6693. TestDFSAdminWithHA fails on windows ( Contributed by Vinayakumar B )


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