Depending of the test environment, the url of the odoo container may
change.
Using pytest in a local shell, Odoo will be available at 0.0.0.0
address.
Using pytest in a docker-in-docker environment, the url for the Odoo
container will be exposed on a different address depending on the
configuration of the docker-in-docker environment.
The mock check whether the user has configured a différent URL for the
Odoo RPC calls, and set it accordingly using mock feature.
In the gitlab-ci, the ODOO_RPC_URL should be used to set the correct
address for the RPC calls.
