Fix facts gathering for zun
Fix facts gathering for zun

We have wrong/non-existing group defined for facts gathering in zun
playbook.

Closes-Bug: #1979208
Change-Id: Ic7f6f2446ea5f1264c44493ca1b329fe07eb9e30

openstack/openstack-ansible,stackforge/os-ansible-deployment,openstack/openstack-ansible,stackforge/os-ansible-deployment