By Molly Geary The Tigers flip-flopped with Gonzaga after a big win over Kentucky. For the first time ever, Auburn is atop the AP men’s college basketball poll. A week after controversially ranking second behind Gonzaga despite receiving more first-place votes, the Tigers have passed the Bulldogs and ascended to No. 1. Auburn, now 18–1 and winner of 15 straight, got the push it needed by beating Kentucky, 80–71, in front of a raucous Auburn Arena crowd on Saturday. Gonzaga, for its part, beat a solid San Francisco team by 16 to move to 15–2 on the season. Arizona (16–1) remained at No. 3 in th…