public static String getProperty(String key) {
    return prop == null ? null : prop.getProperty(key);
  }
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