HADOOP-10094. NPE in GenericOptionsParser#preProcessForWindows(). Contributed by Enis Soztutar.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541991 13f79535-47bb-0310-9956-ffa450edef68
YARN-1222. Make improvements in ZKRMStateStore for fencing (Karthik Kambatla via bikas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541995 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5616. MR Client-AppMaster RPC max retries on socket timeout is too high. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1542001 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5506. Use URLConnectionFactory in DelegationTokenFetcher. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1542011 13f79535-47bb-0310-9956-ffa450edef68
YARN-1401. With zero sleep-delay-before-sigkill.ms, no signal is ever sent (Gera Shegalov via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1542038 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd