[gen/reference-api] Set 'exotic=no' at cluster level if not specified in input yaml

data/grid5000/sites/nancy/clusters/grele/grele.json

data/grid5000/sites/nancy/clusters/grimani/grimani.json

data/grid5000/sites/nancy/clusters/grimoire/grimoire.json

data/grid5000/sites/nancy/clusters/grisou/grisou.json

data/grid5000/sites/nancy/clusters/gros/gros.json

data/grid5000/sites/nancy/clusters/grue/grue.json

data/grid5000/sites/nancy/clusters/grvingt/grvingt.json

data/grid5000/sites/nantes/clusters/econome/econome.json

data/grid5000/sites/nantes/clusters/ecotype/ecotype.json

data/grid5000/sites/rennes/clusters/paranoia/paranoia.json

data/grid5000/sites/rennes/clusters/parapide/parapide.json

data/grid5000/sites/rennes/clusters/parapluie/parapluie.json

data/grid5000/sites/rennes/clusters/parasilo/parasilo.json

data/grid5000/sites/rennes/clusters/paravance/paravance.json

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

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

lib/refrepo/gen/reference-api.rb