Longtime UFC middleweight fighter Kelvin Gastelum accused embattled coach Din Thomas of being a mole for a previous title fight.In July 2016, then-UFC welterweight champion Robbie Lawler put his belt on the line against Tyron Woodley. In what was an upset at the time, Woodley knocked Lawler out in the first round to become the new champion at 170 lbs.Now, years later, we are hearing that Thomas — who has come under fire lately for the comments h…