Enable swift in the Heat gate all the time
Enable swift in the Heat gate all the time

We're skipping swift in the Heat integration tests when using python3,
but there is no reason to, as devstack ought to use python2 if swift
doesn't declare python3 support.

Change-Id: I044bc0536d728965f9637a344325d2d9763e471f

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