YARN-571. Remove user from ContainerLaunchContext. Contributed by Omkar Vinit Joshi.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1486251 13f79535-47bb-0310-9956-ffa450edef68
Updating common and mapreduce CHANGES.txt with 2.0.4.1-alpha release

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1486270 13f79535-47bb-0310-9956-ffa450edef68