HDFS-2285. Merge r1195013 from trunk to 0.23

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HDFS-2410. Merge r1204753 from trunk to 0.23

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HADOOP-7358. Merge r1205697 from trunk to 0.23

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HADOOP-2430. Merge r1211650 from trunk to 0.23

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HADOOP-7888. Merge r1211728 from trunk to 0.23

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HDFS-2764. Merge r1241780 from trunk to 0.23

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HDFS-208. Merge r1204119 from trunk to 0.23

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HDFS-2878. Merge r1242995 from trunk to 0.23

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HADOOP-8108. Merge r1293128 from trunk to 0.23

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HDFS-3003. Merge r1293338 from trunk to 0.23

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HDFS-3014. Merge r1294926 from trunk to 0.23

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HADOOP-7557. Merge r1295261 from trunk to 0.23

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HDFS-3036. Merge r1295961 from trunk to 0.23

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HADOOP-8154. svn merge -c 1298696 from trunk


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HADOOP-7806. svn merge -c 1298700 from trunk


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Merge -r 1298940:1298941 from trunk to branch-0.23. Fixes: MAPREDUCE-3578

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MAPREDUCE-3348. Fixed a bug in MR client to redirect to JobHistoryServer correctly when RM forgets the app. Contributed by Devaraj K.
svn merge --ignore-ancestry -c 1298978 ../../trunk/


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MAPREDUCE-3982. Fixed FileOutputCommitter to not err out for an 'empty-job' whose tasks don't write any outputs. Contributed by Robert Joseph Evans.
svn merge --ignore-ancestry -c 1299047 ../../trunk/


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svn merge -c 1299045. Merge MAPREDUCE-3991 into branch-0.23. (harsh)

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Merge -c 1299100 from trunk to branch-0.23 to fix MAPREDUCE-3773. Add queue metrics with buckets for job run times. Contributed by Owen O'Malley.

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