MAPREDUCE-5366. TestMRAsyncDiskService fails on Windows. Contributed by Chuan Liu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1500842 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9688. Add globally unique Client ID to RPC requests. Contributed by Suresh Srinivas.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1500843 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9688. Adding a file missed in the commit 1500843

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1500847 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd