YARN-525. make CS node-locality-delay refreshable. Contributed by Thomas Graves


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1465009 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5007. fix coverage org.apache.hadoop.mapreduce.v2.hs (Aleksey Gorshkov via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1465017 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