public data overlays are not accessible via API
this shouldn't return empty list: https://minerva-dev.lcsb.uni.lu/minerva//api//projects/PDmap_Dec15_main/overlays/?publicOverlay=True
this shouldn't return empty list: https://minerva-dev.lcsb.uni.lu/minerva//api//projects/PDmap_Dec15_main/overlays/?publicOverlay=True