Fix expected return code in tests when server is uninstalled
It is likely that these were fixed by the original change
b96906156be37a7b29ee74423b82f04070c84e22 but was uncaught because
these tests are not executed in CI because the server is configured.
https://pagure.io/freeipa/issue/7836
Signed-off-by: Rob Crittenden <rcritten@redhat.com>