Comment 54 for bug 1665698

To clarify my understanding of this, per comment 50 and the release note that went with the change:

https://review.openstack.org/#/c/425637/1/releasenotes/notes/libvirt-script-with-empty-path-2b49caa68b05278d.yaml

We basically want:

if libvirt < 1.3.3:
   script.path = '' (as before the change)
else:
   script.path = None (as in the change)

Correct?