Merge branch 'grat-prod' into 'master'

[Nancy][grat] testing -> production

See merge request grid5000/reference-repository!464

Author: RINGOT Patrice

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

@@ -414,7 +414,7 @@
   "supported_job_types": {
     "besteffort": true,
     "deploy": true,
-    "max_walltime": 0,
+    "max_walltime": 604800,
     "queues": [
       "admin",
       "testing"

input/grid5000/sites/nancy/clusters/grat/grat.yaml

@@ -11,7 +11,7 @@ nodes:
     supported_job_types:
       deploy: true
       besteffort: true
-      max_walltime: 0
+      max_walltime: 604800
     processor:
       microarchitecture: Zen 3
       clock_speed: 2100000000