By Ollie Phillips As a former sevens player, the Olympics is always an exciting time. We see the very best of a bunch of athletes who otherwise go under the radar across the rest of the calendar. But in a rugby-mad country like France, where stars like Toulouse and international No9 Antoine Dupont will be on show, this is the time for sevens to take off once and for all. The problem the smaller format of the sport has had relates to the commercial attractiveness and viability of a product that lasts eight hours and isn’t finished inside one day. When London was on the World Sevens circuit, you…