Integrate GJR locations with galaxy-maps and public-galaxy_servers repos

[galaxy-maps](https://github.com/galaxyproject/galaxy-maps/blob/master/server.geojson?short_path=4ec0eac)

[public-galaxy-servers](https://github.com/martenson/public-galaxy-servers)

Inspect if the integration is possible and if it makes sence when repos are not maintained.