HDFS-5440. Extract the logic of handling delegation tokens in HftpFileSystem to the TokenAspect class. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541665 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9594 commons-math

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541672 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5431 Missing pom dependency in MR-client

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HDFS-5474. Deletesnapshot can make Namenode in safemode on NN restarts. Contributed by Sathish.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541685 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5075 httpfs-config.sh calls out incorrect env script name

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541692 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5624 Move grizzly-test and junit dependencies to test scope

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541702 13f79535-47bb-0310-9956-ffa450edef68
Move HDFS-5325 and HDFS-5488 from BUG-FIX to IMPROVEMENT in CHANGES.txt.

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HADOOP-10078. KerberosAuthenticator always does SPNEGO. (rkanter via tucu)

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HADOOP-9956. RPC listener inefficiently assigns connections to readers (daryn)


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Move HADOOP-9956 to correct release in CHANGES.txt


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HADOOP-10095. In CodecPool, synchronize pool and codecList separately in order to reduce lock contention.  Contributed by Nicolas Liochon


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541750 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5444. Choose default web UI based on browser capabilities. Contributed by Haohui Mai.

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HDFS-5504. In HA mode, OP_DELETE_SNAPSHOT is not decrementing the safemode threshold, leads to NN safemode. Contributed by Vinay.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541773 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5487. Introduce unit test for TokenAspect. Contributed by Haohui Mai.

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Merge remote-tracking branch: upstream/trunk