s4:selftest: run test_trust_ntlm.sh against various environments

s4:selftest: run test_trust_ntlm.sh against various environments

This shows that NTLM authentication is currently completely broken
on an DCs of AD domains with trusts.

Currently we completely ignore the client provided domain
and try to authenticate against the username in our local sam.ldb.

If the same username/password combination exists in both domains,
the user of the trusted domain silenty impersonates the user
of the local domain.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=2976
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12709

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>