HDFS-4577. Webhdfs operations should declare if authentication is required. Contributed by Daryn Sharp.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1454517 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9151 Include RPC error info in RpcResponseHeader instead of sending it separately (sanjay Radia)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1454593 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4573. Fix TestINodeFile on Windows. Contributed by Arpit Agarwal.





git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1454616 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