Run gate-bashate-devstack on Xenial
Run gate-bashate-devstack on Xenial

This is a job that runs bashate against devstack. Just push it ahead to
run on Xenial since bashate only has a master branch.

Change-Id: Ib78ab51bc6ad78ae5695a85f45e72592be621846

openstack-infra/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,openstack-infra/project-config