HADOOP-9683. [RPC v9] Wrap IpcConnectionContext in RPC headers (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1503811 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4657.  Limit the number of blocks logged by the NN after a block report to a configurable value.  (Aaron Twinning Meyers via Colin Patrick McCabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1503862 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HADOOP-9291-trunk-gd