[rennes][roazhon4] Update max_walltime to 7 days

data/grid5000/sites/rennes/clusters/roazhon4/nodes/roazhon4-1.json

@@ -257,7 +257,7 @@
   "supported_job_types": {
     "besteffort": true,
     "deploy": true,
-    "max_walltime": 86400,
+    "max_walltime": 604800,
     "queues": [
       "production",
       "admin"