protected ActiveMasterManager createActiveMasterManager(ZKWatcher zk, ServerName sn,
    org.apache.hadoop.hbase.Server server) throws InterruptedIOException {
    return new AlwaysStandByMasterManager(zk, sn, server);
  }
An implementation that never transitions to an active master.
hbase-server/src/test/java/org/apache/hadoop/hbase/master/AlwaysStandByHMaster.java