26ceb4e ipatests: Update ipa-adtrust-install test

1 file Authored by ebelko a month ago, Committed by antorres a month ago,
    ipatests: Update ipa-adtrust-install test
    
    update after change in implementation of `krb_utils.get_principal()` now using GSSAPI
    
    Related: https://pagure.io/freeipa/issue/9575
    
    Signed-off-by: Erik Belko <ebelko@redhat.com>
    Reviewed-By: Michal Polovka <mpolovka@redhat.com>