YARN-1395. Distributed shell application master launched with debug flag can hang waiting for external ls process. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1540839 13f79535-47bb-0310-9956-ffa450edef68
YARN-1387. RMWebServices should use ClientRMService for filtering applications (Karthik Kambatla via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1540851 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HDFS-4311-INVESTIGATION-trunk-gd