Adapt import_zip script to use the right subdivision type per country
Now that we limit the type of subdivisions per country in addresses [1], we should adapt the country import_zip.py script to honour the same criteria.
For example, in Spain it would need to use "code2" instead of "code1" in this line:
https://hg.tryton.org/modules/country/file/tip/scripts/import_zip.py#l84
Maybe we should just always use the smaller (more precise) subdivision.
[1] https://hg.tryton.org/modules/party/rev/15ef94c7a85e