Fix/import payment groups from tryton wizard

CHANGELOG:

### Changed
- [#639](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/639) Add account to the Import debt from Tryton process.

Related card: https://trello.com/c/CVVk7q4g/886-compte-comptable-a-grups-generats-des-de-tryton

---