HDFS-5289. Race condition in TestRetryCacheWithHA#testCreateSymlink causes spurious test failure. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1528693 13f79535-47bb-0310-9956-ffa450edef68
YARN-1213. Restore config to ban submitting to undeclared pools in the Fair Scheduler. (Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1528696 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HDFS-4310-trunk-gd