s3:winbindd: rely on the kerberos_state from pdb_get_trust_credentials()
The implementation of pdb_get_trust_credentials() should have all
the details to set the kerberos_state to a useful value.
This should enable the fallback to NTLMSSP again, when using our
machine account against trusted domains.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12598
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
(cherry picked from commit
51caeb7c538b7546e5feccf27a735bb803c78a0b)