add graphics type='spice' when enable_spice |bool

Author: Christian Iuga

templates/vm.xml.j2

@@ -103,6 +103,11 @@
     <graphics type='vnc' autoport='yes' listen='127.0.0.1'>
       <listen type='address' address='127.0.0.1'/>
     </graphics>
+{% endif %}
+{% if enable_spice |bool %}
+    <graphics type='spice' autoport='yes'>
+      <listen type='address'/>
+    </graphics>
 {% endif %}
     <rng model="virtio"><backend model="random">/dev/urandom</backend></rng>
   </devices>