[all] Added a 'storage' attribute in disk description. Values: HDD or SDD

...id5000/sites/grenoble/clusters/adonis/nodes/adonis-1.json

...d5000/sites/grenoble/clusters/adonis/nodes/adonis-10.json

...id5000/sites/grenoble/clusters/adonis/nodes/adonis-2.json

...id5000/sites/grenoble/clusters/adonis/nodes/adonis-3.json

...id5000/sites/grenoble/clusters/adonis/nodes/adonis-4.json

...id5000/sites/grenoble/clusters/adonis/nodes/adonis-5.json

...id5000/sites/grenoble/clusters/adonis/nodes/adonis-6.json

...id5000/sites/grenoble/clusters/adonis/nodes/adonis-7.json

...id5000/sites/grenoble/clusters/adonis/nodes/adonis-8.json

...id5000/sites/grenoble/clusters/adonis/nodes/adonis-9.json

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