[nancy] Adding sgrapheneib and sgriffonib, but they do not have any cacti graph

data/grid5000/sites/nancy/network_equipments/sgraphene1.json

data/grid5000/sites/nancy/network_equipments/sgraphene2.json

data/grid5000/sites/nancy/network_equipments/sgraphene3.json

data/grid5000/sites/nancy/network_equipments/sgraphene4.json

.../grid5000/sites/nancy/network_equipments/sgrapheneib.json

.../grid5000/sites/nancy/network_equipments/sgravillon1.json

data/grid5000/sites/nancy/network_equipments/sgriffon1.json

data/grid5000/sites/nancy/network_equipments/sgriffon2.json

data/grid5000/sites/nancy/network_equipments/sgriffon3.json

data/grid5000/sites/nancy/network_equipments/sgriffonib.json

data/grid5000/sites/nancy/network_equipments/stalc1.json

data/grid5000/sites/nancy/network_equipments/stalc2.json

data/grid5000/sites/nancy/network_equipments/stalc3.json

data/grid5000/sites/nancy/network_equipments/stalc4.json

generators/input/sites/nancy/net-links/sgrapheneib.yaml

generators/input/sites/nancy/net-links/sgravillon1.yaml

generators/input/sites/nancy/net-links/sgriffonib.yaml