ipatests: new test for trust with partially unreachable AD topology
Establishing trust with partially unavailable AD hosts require usage
of --server option. The new test checks that both commands trust-add
and trust-fetch-domains properly use this option and also that
trust-add correctly passes the server value when imlicitly invoking
trust-fetch-domains.
Relates to: https://pagure.io/freeipa/issue/7895.
Reviewed-By: Tibor Dudlak <tdudlak@redhat.com>
Reviewed-By: Tibor Dudlak <tdudlak@redhat.com>