[16.0] FIX l10n_it_fatturapa_out and l10n_it_fatturapa_out_rc avoiding to convert to EUR tax_base_amount as it is already in company currency (currency_field='company_currency_id')

[16.0] FIX l10n_it_fatturapa_out and l10n_it_fatturapa_out_rc avoiding to convert to EUR tax_base_amount as it is already in company currency (currency_field='company_currency_id') #6028