[gros] Core and node benchmark

data/grid5000/sites/nancy/clusters/gros/nodes/gros-1.json

@@ -126,8 +126,8 @@
     "turboboost_enabled": true
   },
   "performance": {
-    "core_flops": 0,
-    "node_flops": 0
+    "core_flops": 26918000000,
+    "node_flops": 301830000000
   },
   "processor": {
     "cache_l1": null,