TESTS: Add a basic test of `sssctl domain-list`
Let's just add a test for `sssctl domain-list` in order to avoid
regressing https://pagure.io/SSSD/sssd/issue/3658.
The test has been added as part of test_infopipe.py in order to take
advantage of the machinery already provided there.
Resolves:
https://pagure.io/SSSD/sssd/issue/3658
Signed-off-by: Fabiano FidĂȘncio <fidencio@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>