1bdd814 ipatests: mark test_smb as xfail

Authored and Committed by frenaud a year ago
    ipatests: mark test_smb as xfail
    
    Mark the test test_smb.py::TestSMB::test_smb_service_s4u2self as xfail.
    
    Related: https://pagure.io/freeipa/issue/9124
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>