Fix up the vVG server heat template

Issue: TEST-14
Change-Id: I8304325c9c3b2abebd358f7d931d9d7490d33a5b
Signed-off-by: Jerry Flood <jf9860@att.com>
diff --git a/robot/assets/templates/nova_add_server.template b/robot/assets/templates/nova_add_server.template
index 8157839..d40774a 100644
--- a/robot/assets/templates/nova_add_server.template
+++ b/robot/assets/templates/nova_add_server.template
@@ -10,7 +10,7 @@
         },
         "networks": [
             {
-                "uuid": "00000000-0000-0000-0000-000000000000"
+                "uuid": "${public_net_id}"
             }
         ]
     }