layout/tripleo: improve scenarios coverage for glance
layout/tripleo: improve scenarios coverage for glance

Run all scenarios when touching Glance files, because each scenario has
a different backend for Glance.
By testing each scenario, we reduce the change to break Glance
deployments for all backends.

Change-Id: I5b0bfe9c220a34a9b93f158dac1925de46bf5d47

openstack-infra/project-config,openstack-infra/project-config