Save delivery address to mobile contract isp info
CHANGELOG:
### Changed
- [#465](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/465) Add delivery address in mobile service contract info model, and use it the new sim sending letter instead of the partner's invoice one.
New delivery address in mobile isp info:
These fields do not need a default, they will be set and used when clients contact SC to ask for a new SIM, when they will provide a delivery address, which do not need to be any of the partner's. This address will not be saved anywhere else. It is just used for the sending new SIM purpose.
Carta corresponent: Nova_carta_d_enviament_SIM.pdf
Edited by Pelayo García