HDFS-4626. ClientProtocol#getLinkTarget should throw an exception for non-symlink and non-existent paths.  (Andrew Wang via cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493980 13f79535-47bb-0310-9956-ffa450edef68
YARN-805. Fix javadoc and annotations on classes in the yarn-api package. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1493992 13f79535-47bb-0310-9956-ffa450edef68
YARN-834. Fixed annotations for yarn-client module, reorganized packages and clearly differentiated *Async apis. Contributed by Arun C Murthy and Zhijie Shen.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1494017 13f79535-47bb-0310-9956-ffa450edef68
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
YARN-841. Move Auxiliary service to yarn-api, annotate and document it. Contributed by Vinod Kumar Vavilapalli.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1494031 13f79535-47bb-0310-9956-ffa450edef68
YARN-799. Fix CgroupsLCEResourcesHandler to use /tasks instead of /cgroup.procs. Contributed by Chris Riccomini.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1494035 13f79535-47bb-0310-9956-ffa450edef68
YARN-846.  Move pb Impl classes from yarn-api to yarn-common. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1494052 13f79535-47bb-0310-9956-ffa450edef68