Performs bulk operation

def perform(self):
        """
        Performs bulk operation
        """
        for request in self._cfg[Integrator._CFG_KEY_REQUESTS]:
            request_type = self._cfg[Integrator._CFG_KEY_REQUESTS][request][Integrator._CFG_KEY_REQUEST_TYPE]
            request_cfg_file = self._cfg[Integrator._CFG_KEY_REQUESTS][request][Integrator._CFG_KEY_REQUEST_CFG_FILE]
            self._logger.debug('{}'.format(request_cfg_file))
            self._process_request(request, request_type, request_cfg_file)