Apply libvirt firewall policy only on devices with vm_support

roles/lmn_exam/tasks/main.yml

@@ -62,9 +62,11 @@
     src: no-way-out.xml.j2
     dest: "/etc/firewalld/policies/no-way-out-{{ item }}.xml"
     mode: '0644'
-  loop:
-    - HOST
-    - libvirt
+  vars:
+    zones:
+      - HOST
+      - "{{ 'libvirt' if vm_support | default(false) else '' }}"
+  loop: "{{ zones | reject('match','^$') }}"
   when:
     - exam_destination_allowed_ipv4 is defined
     - exam_destination_allowed_ipv4 | length > 0