YARN-412. Pushing to 2.0.5-beta only.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.0.4-alpha@1467469 13f79535-47bb-0310-9956-ffa450edef68
Re-generated releasenotes.html for hadoop-2.0.4-alpha-rc2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.0.4-alpha@1467477 13f79535-47bb-0310-9956-ffa450edef68