YARN-610. ClientToken is no longer set in the environment of the Containers. Contributed by Omkar Vinit Joshi.
svn merge --ignore-ancestry -c 1493968 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493969 13f79535-47bb-0310-9956-ffa450edef68