None of the barbican tempest tests should run pre-Pike
None of the barbican tempest tests should run pre-Pike

The scenario tests were added during Pike, and so they are not
meant to be run on the other stable branches.

Change-Id: I4468c4a4b6916c84dd9819d6ef7b12ab0b474387

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