Fix the bundle name format again, with feeling this time!
    
    As it turns out, '%N' is actually the full image name, as
    understood internally as 'kiwi_iname' and already names it
    what we expect (base name-requested profile).
    
    Additionally, '%T' just adds the image type, and isn't
    responsible for the file extension at all.
    
    This should bring us into alignment with the naming
    convention we actually expect.
    
    Signed-off-by: Neal Gompa <ngompa@fedoraproject.org>