By Fraser Watson Welsh rugby legend Alun Wyn Jones has revealed he has undergone surgery for a heart problem after stepping away from the game last month. After 170 international caps and a professional career that spanned 19 years, the legendary second row retired in November as he was given a standing ovation with club side Toulon. He did not explain the reasons for his decision at the time but in an interview with theDaily Telegraph, Wyn Jones conceded neither he or his family would be able to “move forward” unless he answered what were becoming increasing difficult questions. “I was diagno…