@VisibleForTesting
  public static void setTwoMetastoreTesting(boolean twoMetastoreTesting) {
    forTwoMetastoreTesting = twoMetastoreTesting;
  }
To make possible to run multiple metastore in unit test

@param twoMetastoreTesting if we are using multiple metastore in unit test
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/PersistenceManagerProvider.java