List container objects

        :param container: container name (Container is equivalent to
                          Bucket term in Amazon).
        :param prefix: prefix query
        :param delimiter: string to delimit the queries on

def list_container_objects(self, container, prefix=None, delimiter=None):
        """List container objects

        :param container: container name (Container is equivalent to
                          Bucket term in Amazon).
        :param prefix: prefix query
        :param delimiter: string to delimit the queries on
        """
        LOG.debug('list_container_objects() with %s is success.', self.driver)
        return self.driver.list_container_objects(container, prefix, delimiter)