Basic config that generate ref-api

data/grid5000/sites/lyon/clusters/test/nodes/test-1.json

data/grid5000/sites/lyon/clusters/test/nodes/test-2.json

data/grid5000/sites/lyon/clusters/test/test.json

input/grid5000/ipv4.yaml

input/grid5000/sites/lyon/clusters/test/test.yaml

input/grid5000/sites/lyon/clusters/test/test_ip.yaml.erb