YARN-724. Moved ProtoBase from api.records to api.records.impl.pb. Contributed by Jian He.
MAPREDUCE-5303. Changed MR app after moving ProtoBase to package impl.pb via YARN-724. Contributed by Jian He.
svn merge --ignore-ancestry -c 1489658 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489659 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4815. TestRBWBlockInvalidation: Double call countReplicas() to fetch corruptReplicas and liveReplicas is not needed. Contributed by Tian Hong Wang.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489670 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1489708 from trunk for HDFS-4876. Fix the javadoc of FileWithSnapshot and move FileDiffList to FileWithSnapshot.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489709 13f79535-47bb-0310-9956-ffa450edef68