YARN-827. Need to make Resource arithmetic methods accessible^CJian He via bikas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1495533 13f79535-47bb-0310-9956-ffa450edef68
Update CHANGES.txt to move HDFS-4772 to 2.1.0 section

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1495543 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9619 Mark stability of .proto files (sanjay Radia)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1495564 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9421. [RPC v9] Convert SASL to use ProtoBuf and provide negotiation capabilities (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1495577 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-xxx-hadoop-auth-kerberos-realm-trunk-gd