HADOOP-10402. Configuration.getValByRegex does not substitute for variables. (Robert Kanter via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1617174 13f79535-47bb-0310-9956-ffa450edef68
YARN-2337. ResourceManager sets ClientRMService in RMContext multiple times. (Zhihai Xu via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1617184 13f79535-47bb-0310-9956-ffa450edef68
YARN-2361. RMAppAttempt state machine entries for KILLED state has duplicate event entries. (Zhihai Xu via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1617191 13f79535-47bb-0310-9956-ffa450edef68