fix check if level_location is callable
fix check if level_location is callable

mapproxy/mapproxy,olt/mapproxy,camptocamp/mapproxy,vrsource/mapproxy,vrsource/mapproxy,camptocamp/mapproxy,mapproxy/mapproxy,drnextgis/mapproxy,drnextgis/mapproxy,olt/mapproxy