Merge branch 'testing-mercantour4' into 'master'

...id5000/sites/sophia/clusters/mercantour4/mercantour4.json

...ites/sophia/clusters/mercantour4/nodes/mercantour4-1.json

data/grid5000/sites/sophia/network_equipments/sw-3.json

input/grid5000/dell-product-data.yaml

input/grid5000/disks.yaml

input/grid5000/ipv4.yaml

...id5000/sites/sophia/clusters/mercantour4/mercantour4.yaml

...ites/sophia/clusters/mercantour4/mercantour4_metrics.yaml

...ites/sophia/clusters/mercantour4/nodes/mercantour4-1.yaml

input/grid5000/sites/sophia/networks/sw-3.yaml

lib/refrepo/input_loader.rb

lib/refrepo/net_names_mapping.yaml