1eba525 test_external_ca: selfsigned->ext_ca->selfsigned

Authored and Committed by mreznik 6 years ago
    test_external_ca: selfsigned->ext_ca->selfsigned
    
    Add selfsigned > external_ca > selfsigned test case.
    
    Covers Pagure issue #7106
    
    https://pagure.io/freeipa/issue/7302
    
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>