HADOOP-10561. Copy command with preserve option should handle Xattrs. Contributed by Yi Liu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1602225 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5912. Task.calculateOutputSize does not handle Windows files after MAPREDUCE-5196. Contributed by Remus Rusanu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1602282 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6395. Skip checking xattr limits for non-user-visible namespaces. Contributed by Yi Liu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1602288 13f79535-47bb-0310-9956-ffa450edef68