Remove docker images for a specific service.  This method will call itself recursively for dependents and
         dependencies.

        :param service:
        :return None:

def offload_expired_service_cargo(self, service):
        """Remove docker images for a specific service.  This method will call itself recursively for dependents and
         dependencies.

        :param service:
        :return None:
        """
        # TODO: move offload cargo logic to this method
        self._service_map(service, self._offload_cargo, descending=True)