YARN-2115. Replaced RegisterNodeManagerRequest's ContainerStatus with a new NMContainerStatus which has more information that is needed for work-preserving RM-restart. Contributed by Jian He.
svn merge --ignore-ancestry -c 1598790 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1598791 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6056. Merging change r1598782 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1598792 13f79535-47bb-0310-9956-ffa450edef68