Use somconnexio as default previous provider in Change contract address wizard
CHANGELOG:
### Changed
- [#1035](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/1035) Use somconnexio as default previous provider in Change contract address wizard
Related card: https://trello.com/c/eELN0ebd/1635-enviar-el-camp-proveidorprevi-somconnexio-per-defecte
Edited by Daniel Palomar