[IMP] l10n_es_dua_sii: Don't depend on tax description
[IMP] l10n_es_dua_sii: Don't depend on tax description

* README update. Not related but rechecking the roadmap was not accurated
* Tests adapted
* Tax description renamed

OCA/l10n-spain,OCA/l10n-spain,OCA/l10n-spain