Trust entries were found by presence of ipaNTSecurityIdentifier
attribute. Unfortunately this attribute might not be there due the bug.
As replacement for this, attribute ipaNTTrustPartner can be used.
Note: other non trust entries located in cn=trusts subtree can be
cross-realm principals.
https://fedorahosted.org/freeipa/ticket/5665
Reviewed-By: Tomas Babej <tbabej@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>