HBASE-8270 Backport HBASE-8097 'MetaServerShutdownHandler may potentially keep bumping up DeadServer.numProcessing' to 0.94 (Jeffrey Zhong)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1465120 13f79535-47bb-0310-9956-ffa450edef68