code: public static SpecExecutor createDummySpecExecutor(URI uri) {
      Properties properties = new Properties();
      properties.setProperty(ConfigurationKeys.SPECEXECUTOR_INSTANCE_URI_KEY, uri.toString());
      return new InMemorySpecExecutor(ConfigFactory.parseProperties(properties));
    }
docs: A creator that create a SpecExecutor only specifying URI for uniqueness.
  @param uri