Recently a change [1] was merged which forced new netvirt to be used for all gate jobs, but intention was to use it for fullstack carbon and nitrogen job. This is followup to revert [2] of [1] [1]. https://review.openstack.org/#/c/482281/ [2]. https://review.openstack.org/#/c/482814/ Change-Id: I495c2fa61d233cea74a5fd7c2f0145f7821700e5