YARN-493. Fixed some shell related flaws in YARN on Windows. Contributed by Chris Nauroth.
HADOOP-9486. Promoted Windows and Shell related utils from YARN to Hadoop Common. Contributed by Chris Nauroth.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1469667 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HADOOP-7435-trunk-gd