MAPREDUCE-5694. Fixed MR AppMaster to shutdown the LogManager so as to avoid losing syslog in some conditions. Contributed by Mohammad Kamrul Islam.
svn merge --ignore-ancestry -c 1553879 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1553880 13f79535-47bb-0310-9956-ffa450edef68