HBASE-7530  [replication] Work around HDFS-4380 else we get NPEs
HBASE-7531  [replication] NPE in SequenceFileLogReader because
            ReplicationSource doesn't nullify the reader
HBASE-7534  [replication] TestReplication.queueFailover can fail
            because HBaseTestingUtility.createMultiRegions is dangerous


git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1431768 13f79535-47bb-0310-9956-ffa450edef68