[nancy/grouille] Kavlan is true

data/grid5000/sites/nancy/clusters/grouille/grouille.json

 {
   "created_at": "Wed, 13 Jan 2021 00:00:00 GMT",
   "exotic": false,
-  "kavlan": false,
+  "kavlan": true,
   "metrics": [
     {
       "description": "Input byte counter for the network device port",