[nancy] Updated griffon-4 for tests

data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-4.json

 {
   "architecture": {
+    "nb_cores": 8,
+    "nb_procs": 2,
+    "nb_threads": 8,
     "platform_type": "x86_64",
     "smp_size": 2,
     "smt_size": 8
@@ -110,10 +113,17 @@
     }
   ],
   "operating_system": {
+    "cstate_driver": "none",
+    "cstate_governor": "menu",
+    "cstate_max_id": null,
+    "ht_enabled": false,
     "kernel": "3.16.0-4-amd64",
     "name": "debian",
+    "pstate_driver": "acpi-cpufreq",
+    "pstate_governor": "performance",
     "release": "Jessie",
-    "version": "8.2"
+    "turboboost_enabled": "unknown",
+    "version": 8.5
   },
   "performance": {
     "core_flops": 7963000000.0,
@@ -126,6 +136,7 @@
     "cache_l2": 6291456,
     "cache_l3": 0,
     "clock_speed": 2500000000,
+    "ht_capable": true,
     "instruction_set": "x86-64",
     "model": "Intel Xeon",
     "other_description": "Intel(R) Xeon(R) CPU           L5420  @ 2.50GHz",