@After
  public void after() throws Exception {
    HTU.shutdownMiniCluster();
  }
Tests region replication for hbase:meta by setting up region replicas and verifying async wal
replication replays the edits to the secondary region in various scenarios.
@see TestRegionReplicaReplication
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestMetaRegionReplicaReplication.java