Merge branch 'est5_merc6_prod' into 'master'

data/grid5000/accesses/nodesets.json

data/grid5000/sites/sophia/clusters/esterel5/esterel5.json

...5000/sites/sophia/clusters/esterel5/nodes/esterel5-1.json

...5000/sites/sophia/clusters/esterel5/nodes/esterel5-2.json

...id5000/sites/sophia/clusters/mercantour6/mercantour6.json

...ites/sophia/clusters/mercantour6/nodes/mercantour6-1.json

input/grid5000/access/sophia.yaml

input/grid5000/sites/sophia/clusters/esterel5/esterel5.yaml

...id5000/sites/sophia/clusters/mercantour6/mercantour6.yaml