HDFS-5667. Include DatanodeStorage in StorageReport. (Arpit Agarwal)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1555929 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10193. hadoop-auth's PseudoAuthenticationHandler can consume getInputStream. (gchanan via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1555955 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5667. Add test missed in previous checkin

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1555956 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-3310. Custom grouping comparator cannot be set for Combiners (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1555968 13f79535-47bb-0310-9956-ffa450edef68
YARN-1559. Race between ServerRMProxy and ClientRMProxy setting RMProxy#INSTANCE. (kasha and vinodkv via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1555970 13f79535-47bb-0310-9956-ffa450edef68
YARN-1560. Fixed TestYarnClient#testAMMRTokens failure with null AMRM token. (Contributed by Ted Yu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1555975 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5220. Expose group resolution time as metric (jxiang via cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1555976 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5589. Namenode loops caching and uncaching when data should be uncached. (awang via cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1555996 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch: upstream/trunk