The interview with John Hayes has been running for just under 30 minutes and we’ve been talking about his early life in rugby. But then something happens which makes everything that’s been said before seem almost inconsequential. We’re sitting in Hayes’s spacious kitchen in Cappamore, Co Limerick. It’s the second time I’ve been here – the first was almost 17 years ago, a couple of months after Hayes had been part of Ireland’s 2009 Grand Slam-winning team.  He’s not a man who talks much – his wedding speech was timed at one minute. For almost all of his career, he…