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

...0/sites/lyon/clusters/sagittaire/nodes/sagittaire-31.json

...00/sites/lyon/clusters/sagittaire/nodes/sagittaire-4.json

...00/sites/lyon/clusters/sagittaire/nodes/sagittaire-5.json

...00/sites/lyon/clusters/sagittaire/nodes/sagittaire-6.json

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

.../grid5000/sites/lyon/clusters/taurus/nodes/taurus-10.json

.../grid5000/sites/lyon/clusters/taurus/nodes/taurus-11.json

.../grid5000/sites/lyon/clusters/taurus/nodes/taurus-12.json

.../grid5000/sites/lyon/clusters/taurus/nodes/taurus-13.json

.../grid5000/sites/lyon/clusters/taurus/nodes/taurus-15.json

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

data/grid5000/sites/lyon/clusters/taurus/nodes/taurus-3.json

data/grid5000/sites/lyon/clusters/taurus/nodes/taurus-4.json

data/grid5000/sites/lyon/clusters/taurus/nodes/taurus-5.json

data/grid5000/sites/lyon/clusters/taurus/nodes/taurus-6.json

data/grid5000/sites/lyon/clusters/taurus/nodes/taurus-7.json

data/grid5000/sites/lyon/clusters/taurus/nodes/taurus-8.json

data/grid5000/sites/lyon/clusters/taurus/nodes/taurus-9.json

...d5000/sites/nancy/clusters/graffiti/nodes/graffiti-1.json

...5000/sites/nancy/clusters/graffiti/nodes/graffiti-10.json