container-toolbox: Synchronize the tests with the Container/Dockerfile
    
    The same changes were made to the Container/Dockerfile equivalent of the
    fedora-toolbox OCI images in recent times [1, 2, 3].
    
    [1] Toolbx commit 20188a097a1a7a16
        https://github.com/containers/toolbox/commit/20188a097a1a7a16
        https://github.com/containers/toolbox/pull/1384
    
    [2] Toolbx commit e41d920dd9a847cc
        https://github.com/containers/toolbox/commit/e41d920dd9a847cc
        https://github.com/containers/toolbox/pull/1390
    
    [3] Toolbx commit 9b5313e5a76c9278
        https://github.com/containers/toolbox/commit/9b5313e5a76c9278
        https://github.com/containers/toolbox/pull/1394
    
    https://pagure.io/fedora-kickstarts/pull-request/1008