Generate ref api with 'exotic' field (true pyxis, false for others)

.../grid5000/sites/grenoble/clusters/dahu/nodes/dahu-28.json

.../grid5000/sites/grenoble/clusters/dahu/nodes/dahu-29.json

data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-3.json

.../grid5000/sites/grenoble/clusters/dahu/nodes/dahu-30.json

.../grid5000/sites/grenoble/clusters/dahu/nodes/dahu-31.json

.../grid5000/sites/grenoble/clusters/dahu/nodes/dahu-32.json

data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-4.json

data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-5.json

data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-6.json

data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-7.json

data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-8.json

data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-9.json

...grid5000/sites/grenoble/clusters/troll/nodes/troll-1.json

...grid5000/sites/grenoble/clusters/troll/nodes/troll-2.json

...grid5000/sites/grenoble/clusters/troll/nodes/troll-3.json

...grid5000/sites/grenoble/clusters/troll/nodes/troll-4.json

data/grid5000/sites/grenoble/clusters/yeti/nodes/yeti-1.json

data/grid5000/sites/grenoble/clusters/yeti/nodes/yeti-2.json

data/grid5000/sites/grenoble/clusters/yeti/nodes/yeti-3.json

data/grid5000/sites/grenoble/clusters/yeti/nodes/yeti-4.json