Fix for proper UNIX group

Without this fix, Nova will not be able to properly spawn instances
via libvirt

Change-Id: I4b13de4ba2ff73ec2cd5bbe83ca545e5b80b4797
diff --git a/nova/compute.sls b/nova/compute.sls
index 02b636a..532e4b2 100644
--- a/nova/compute.sls
+++ b/nova/compute.sls
@@ -29,6 +29,13 @@
     - service: nova_compute_services
 {%- endif %}
 
+# MOS9 libvirt fix to create group
+group_libvirtd:
+  group.present:
+    - name: libvirtd
+    - system: True
+    - require_in:
+      - user: user_nova
 
 {%- if not salt['user.info']('nova') %}
 user_nova: