YARN-536. Removed the unused objects ContainerStatus and ContainerStatus from Container which also don't belong to the container. Contributed by Xuan Gong.
svn merge --ignore-ancestry -c 1464271 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1464272 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-HADOOP-7435-branch-2-gd