LONDON — Chris Froome knows how little trust there is in his sport. “People will forever be suspicious because of cycling’s history,” the five-time Tour de France champion told The Times of London earlier this year. “I completely get it. They have a right to be.” Now the finger of suspicion is being pointed at Froome, with questions from cycling authorities after the Team Sky front-man failed a doping test following his use of the asthma drug, salbutamol.