Certificates permission fixed for libvirt vnc+tls

  * Nova and libvirt-qemu users must have read acces to cert files.
    User libvirt-qemu added to Nova group in compute state.

Change-Id: I7fdd2bafc555b80bf99ea8906c67d6a084ccca79
diff --git a/nova/compute.sls b/nova/compute.sls
index c088ccf..b7a2131 100644
--- a/nova/compute.sls
+++ b/nova/compute.sls
@@ -255,7 +255,7 @@
     - contents_pillar: nova:compute:qemu:vnc:tls:cacert
     - mode: 644
     - user: root
-    - group: libvirt-qemu
+    - group: nova
     - makedirs: true
     - require:
       - user: user_libvirt-qemu
@@ -271,7 +271,7 @@
     - contents_pillar: nova:compute:qemu:vnc:tls:cert
     - mode: 640
     - user: root
-    - group: libvirt-qemu
+    - group: nova
     - makedirs: true
     - require:
       - user: user_libvirt-qemu
@@ -287,7 +287,7 @@
     - contents_pillar: nova:compute:qemu:vnc:tls:key
     - mode: 640
     - user: root
-    - group: libvirt-qemu
+    - group: nova
     - makedirs: true
     - require:
       - user: user_libvirt-qemu
@@ -303,7 +303,7 @@
       - {{ cert_file }}
       - {{ key_file }}
     - user: root
-    - group: libvirt-qemu
+    - group: nova
     - require:
       - user: user_libvirt-qemu