MAPREDUCE-5240 inside of FileOutputCommitter the initialized Credentials cache appears to be empty

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HADOOP-9407. commons-daemon 1.0.3 dependency has bad group id causing build issues. Contributed by Sangjin Lee.

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Updating releasenotes.html for 2.0.5 release

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Fixing CHANGES.txt before release

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Preparing release 2.0.5-alpha: setting version of the artifacts to 2.0.5-alpha

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