'This driver does not support reservations.
This routine is provided for backward compatibility purposes with
the API controllers which have now been adapted to make reservations
rather than counting resources and checking limits - as this
routine ultimately does.'

def make_reservation(self, context, tenant_id, resources, deltas, plugin):

    for resource in deltas.keys():
        count = QUOTAS.count(context, resource, plugin, tenant_id)
        total_use = (deltas.get(resource, 0) + count)
        deltas[resource] = total_use
    self.limit_check(context, tenant_id, resource_registry.get_all_resources(), deltas)
    return quota_api.ReservationInfo('fake', None, None, None)
