Use `get_subnets_for_room` method when migrating and fix #277
Use `get_subnets_for_room` method when migrating and fix #277


agdsn/pycroft,agdsn/pycroft,lukasjuhrich/pycroft,agdsn/pycroft,agdsn/pycroft,lukasjuhrich/pycroft,agdsn/pycroft,lukasjuhrich/pycroft,lukasjuhrich/pycroft