[rennes] Update Aruba gateway IPs

data/grid5000/sites/rennes/network_equipments/gw.json

 {
   "alias": [
     {
-      "ip": "172.17.111.211",
+      "ip": "172.16.111.254",
       "name": "gw-rennes"
     },
     "gw-rennes"
@@ -21,7 +21,7 @@
       "uid": "srv-data"
     }
   },
-  "ip": "172.16.111.254",
+  "ip": "172.17.111.211",
   "ip6": "2001:660:4406:700::ffff:ffff",
   "kind": "router",
   "linecards": [

input/grid5000/sites/rennes/networks/gw.yaml

@@ -5,11 +5,11 @@ gw:
   kind: router
   site: rennes
   snmp_community: public
-  ip: 172.16.111.254
+  ip: 172.17.111.211
   ip6: 2001:660:4406:700::ffff:ffff
   alias:
     - name: gw-rennes
-      ip: 172.17.111.211
+      ip: 172.16.111.254
     - gw-rennes
   backplane_bps: 1440000000000
   vlans: