AMBARI-2276. Hadoop 2: YARN/MR2 service checks cannot be stack-specific. (Oleksander Diachenko via ncole)

git-svn-id: https://svn.apache.org/repos/asf/incubator/ambari/branches/branch-1.4.0@1489488 13f79535-47bb-0310-9956-ffa450edef68