HDFS-5842. Cannot create hftp filesystem when using a proxy user ugi and a doAs on a secure cluster. Contributed by Jing Zhao.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1562603 13f79535-47bb-0310-9956-ffa450edef68
Update HDFS and Common CHANGES.txt post branch-2.3 reswizzle.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1562632 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5732. Report proper queue when job has been automatically placed (Sandy Ryza)

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Add missing file for MAPREDUCE-5732

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HDFS-5845. SecondaryNameNode dies when checkpointing with cache pools.

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HDFS-5841. Update HDFS caching documentation with new changes. (wang)

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Update CHANGES.txt to move HDFS-5842 to 2.3.0

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HADOOP-10305. Add rpc.metrics.quantile.enable and rpc.metrics.percentiles.intervals to core-default.xml. Contributed by Akira Ajisaka.

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HDFS-5492. Port HDFS-2069 (Incorrect default trash interval in the docs) to trunk. (Contributed by Akira Ajisaka)

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