YARN-538. RM address DNS lookup can cause unnecessary slowness on every JHS page load. (sandyr via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1464197 13f79535-47bb-0310-9956-ffa450edef68
YARN-458. YARN daemon addresses must be placed in many different configs. (sandyr via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1464204 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5098. Fix findbugs warnings in gridmix. (kkambatl via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1464209 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9401. CodecPool: Add counters for number of (de)compressors leased out. (kkambatl via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1464219 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd