Revenge is a dish best served cold, they say. Volkswagen seem to have kept that in mind in dealing with errant supplier Prevent, which halted VW production lines in 2016. They have reportedly cut ties with the group. What do brake parts, yachts, couches, shoes and Volkswagen have in common? Top marks if you answered the Prevent Group, a little known company of Bosnian origins and many interests that has…