[nancy] add pve-2 and wattmetre-gros

data/grid5000/sites/nancy/servers/pve-2.json

+{
+  "alias": [
+
+  ],
+  "kind": "physical",
+  "network_adapters": {
+    "adm": {
+      "ip": "172.17.79.39"
+    },
+    "bmc": {
+      "ip": "172.17.79.40",
+      "mac": "7c:a6:2a:38:b2:da"
+    },
+    "default": {
+      "ip": "172.16.79.39",
+      "mac": "d4:04:e6:41:96:78"
+    }
+  },
+  "serial": "CZJD1200CJ",
+  "type": "server",
+  "uid": "pve-2"
+}
\ No newline at end of file