Fix/ subscription request creation without is company, firstname or lastname
CHANGELOG:
### Fixed
- [#457](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/457) Avoid error if 'firstname', 'lastname' or 'is_company' fields are not found as parameters in SubscriptionRequest creation.
Changes due to MR https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/421
With this changes the pipeline does not skip some tests due to failing to load the demo data
Module somconnexio demo data failed to install, installed without demo data
Edited by Pelayo García