Fix OTRSClient instanciation with link_tickets job
CHANGELOG:
### Fix
- [#903](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/903) Fix OTRSClient instanciation with 'link_pack_tickets' job
CHANGELOG:
### Fix
- [#903](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/903) Fix OTRSClient instanciation with 'link_pack_tickets' job