Feature/unlimit mac address contract
CHANGELOG:
### CHANGED
- [#564](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/564) Relax router mac address validations
Edited by Pelayo García
CHANGELOG:
### CHANGED
- [#564](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/564) Relax router mac address validations