Fix for failing tests on CI with no locale set

[EdwardBetts]

Update the tests so they support running on a system where Python is not able to determine the default locale.

Output of a failed build with the default locale is not set is here:
https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/python-renault-api.html

[epenet]

I don't think this is the correct fix.
You are fixing the tests, but you are not fixing running the CLI with no locale set.

renault-api/src/renault_api/cli/renault_client.py

Lines 34 to 36 in 71a6c08

	default_locale = getdefaultlocale()[0]
	while True:
	locale = click.prompt("Please select a locale", default=default_locale)

[epenet]

I don't think this is the correct fix. You are fixing the tests, but you are not fixing running the CLI with no locale set.

Cancel that! I think the fix is correct.

[epenet]

LGTM 👍