[rennes][abacus25] Add second part of abacus25 cluster

...5000/sites/rennes/clusters/abacus25/nodes/abacus25-3.json

...5000/sites/rennes/clusters/abacus25/nodes/abacus25-4.json

...000/sites/rennes/network_equipments/swdc-a035-02-rba.json

input/grid5000/disks.yaml

input/grid5000/sites/rennes/clusters/abacus25/abacus25.yaml

...5000/sites/rennes/clusters/abacus25/nodes/abacus25-3.yaml

...5000/sites/rennes/clusters/abacus25/nodes/abacus25-4.yaml

input/grid5000/sites/rennes/networks/swdc-a035-02-rba.yaml

lib/refrepo/valid/data/homogeneity.yaml.erb