default_vlan_tag is now a config var

Change-Id: Iddd251ff031fd63fdb09e6b0a4a7ffd81833e0f8
diff --git a/admin.py b/admin.py
index c442681..684d02c 100644
--- a/admin.py
+++ b/admin.py
@@ -436,6 +436,6 @@
     print 'The DB knows about %d port(s)' % len(ports)
     vlans = db.all_vlans()
     print 'The DB knows about %d vlan(s)' % len(vlans)
-    print 'The default vlan tag (%d) is vlan_id %d' % (default_vlan_tag, default_vlan_id)
+    print 'The default vlan tag (%d) is vlan_id %d' % (config.vland.default_vlan_tag, default_vlan_id)
 else:
     print 'No recognised command given. Try -h for help'