Tommy Kelly bounds up the stairs after sharing his business story on stage before a thousand people packed into the coliseum-style auditorium at Goffs, Co Kildare, where the Real Deal conference is in full swing. Does he have a minute? “Of course,” he instantly replies.  A few minutes later, we are in a quiet room on the margins of the conference, talking. Kelly is one of the great Irish business success stories. Growing up on a farm in North Dublin, he created ESW, formerly EShopWorld, a global e-commerce behemoth that trades in 200 countries and works with brands such as…