test_smb: test S4U2Self operation by IPA service
Kerberos service might request a ticket to itself on behalf of a user
to perform protocol transition, so-called S4U2Self extension defined
in [MS-SFU] specification. Processing of this request by KDC differs for
in-realm and cross-realm configurations.
Use SMB service to test S4U2Self performed against AD and IPA users.
Fixes: https://pagure.io/freeipa/issue/8319
Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Isaac Boukris <iboukris@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>