HDFS-4818. Several HDFS tests that attempt to make directories unusable do not work correctly on Windows. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1494023 13f79535-47bb-0310-9956-ffa450edef68
YARN-840. Moved ProtoUtils to yarn.api.records.pb.impl. Contributed by Jian He.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1494027 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HDFS-4312-trunk-gd