[lille] add jupyterhub vm

data/grid5000/sites/lille/servers/jupyterhub.json

+{
+  "kind": "virtual",
+  "network_adapters": {
+    "default": {
+      "ip": "172.16.47.159"
+    }
+  },
+  "type": "server",
+  "uid": "jupyterhub"
+}