TESTS: Add a basic test of `sssctl domain-list`
Let's just add a test for `sssctl domain-list` in order to avoid
The test has been added as part of test_infopipe.py in order to take
advantage of the machinery already provided there.
Signed-off-by: Fabiano Fidêncio <email@example.com>
Reviewed-by: Jakub Hrozek <firstname.lastname@example.org>