TOOLS: supply default for api_key of loadGeoPossibilities
TOOLS: supply default for api_key of loadGeoPossibilities

to make it work with add_auto_libraries.py and geoloc.py too where
it is imported from add_library.py.

raphaelm/opacclient,opacapp/opacclient,opacapp/opacclient,opacapp/opacclient,raphaelm/opacclient,opacapp/opacclient,raphaelm/opacclient,opacapp/opacclient