transform ariane_clip3 subnet object to Ariane server JSON obj
        :return: Ariane JSON obj

def subnet_2_json(self):
        """
        transform ariane_clip3 subnet object to Ariane server JSON obj
        :return: Ariane JSON obj
        """
        LOGGER.debug("Subnet.subnet_2_json")
        json_obj = {
            'subnetID': self.id,
            'subnetName': self.name,
            'subnetDescription': self.description,
            'subnetIP': self.ip,
            'subnetMask': self.mask,
            'subnetRoutingAreaID': self.routing_area_id,
            'subnetIPAddressesID': self.ipAddress_ids,
            'subnetLocationsID': self.loc_ids,
            'subnetOSInstancesID': self.osi_ids
        }
        return json.dumps(json_obj)