This update ensures that the POS system can work with both older and newer IoT Box devices during a transition period. The system was updated to use a single configuration file instead of multiple files, but some devices haven't been updated yet. This fix allows the system to check both the old and new configuration methods, ensuring seamless operation regardless of which IoT Box version is being used.

As we replaced the individual config files by a single `odoo.conf`, we need to adapt the code to keep compatibility between updated and non-updated IoT Boxes.

As we did not update this one in the migration method from [this PR](https://github.com/odoo/odoo/pull/173866), we have to try both old and new methods to get the config value.

opw-4183138