gateway detection https://github.com/Juniper/contrail-charms/commit/3e5f8a76dbbf26b7b9d0ea15cb7afcdf53bf8a35
gateway detection https:/ /github. com/Juniper/ contrail- charms/ commit/ 3e5f8a76dbbf26b 7b9d0ea15cb7afc df53bf8a35