HBASE-8229 Replication code logs like crazy if a target table cannot be found.

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1464275 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8230 Possible NPE on regionserver abort if replication service has not been started

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1464282 13f79535-47bb-0310-9956-ffa450edef68