Uniformize field country_id, country_code, country

dev/initdata/generate-societe.php

htdocs/adherents/class/adherent.class.php

htdocs/adherents/fiche.php

htdocs/admin/company.php

htdocs/admin/prelevement.php

htdocs/cashdesk/facturation.php

htdocs/categories/categorie.php

htdocs/comm/address.php

htdocs/comm/contact.php

htdocs/comm/fiche.php

htdocs/comm/index.php

htdocs/comm/propal.php

htdocs/comm/prospect/fiche.php

htdocs/commande/fiche.php

htdocs/compta/bank/bankid_fr.php

htdocs/compta/bank/class/account.class.php

htdocs/compta/bank/fiche.php

htdocs/compta/facture/prelevement.php

htdocs/compta/localtax/clients.php

htdocs/compta/localtax/fiche.php