HDFS-6334. Client failover proxy provider for IP failover based NN HA. Contributed by Kihwal Lee.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594263 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10585. Retry polices ignore interrupted exceptions (Daryn Sharp via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594267 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6305. WebHdfs response decoding may throw RuntimeExceptions (Daryn Sharp via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594273 13f79535-47bb-0310-9956-ffa450edef68
YARN-1751. Improve MiniYarnCluster for log aggregation testing. Contributed by Ming Ma


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594275 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10566. Refactor proxyservers out of ProxyUsers. Contributed by Benoy Antony.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594280 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10566. Adding files missed in previous commit 1594280

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594282 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10572. Example NFS mount command must pass noacl as it isn't supported by the server yet. Contributed by Harsh J.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594289 13f79535-47bb-0310-9956-ffa450edef68