[Grenoble] edel - add monotring property

data/grid5000/sites/grenoble/clusters/edel/nodes/edel-1.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-10.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-11.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-12.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-13.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-14.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-15.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-16.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-17.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-18.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-19.json

data/grid5000/sites/grenoble/clusters/edel/nodes/edel-2.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-20.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-21.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-22.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-23.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-24.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-25.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-26.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-27.json