YARN-651. Changed PBClientImpls of ContainerManager and RMAdmin to throw IOExceptions also. Contributed by Xuan Gong.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1480154 13f79535-47bb-0310-9956-ffa450edef68
YARN-582. Changed ResourceManager to recover Application token and client tokens for app attempt so that RM can be restarted while preserving current applications. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1480168 13f79535-47bb-0310-9956-ffa450edef68