private static boolean isCatalogTable(final TableName tableName) {
    return tableName.equals(TableName.META_TABLE_NAME);
  }
Switch for the background CatalogJanitor thread. Used for testing. The thread will continue to
run. It will just be a noop if disabled.
@param b If false, the catalog janitor won't do anything.
hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java