ATLANTA — In just his third day on the job, Georgia Tech’s new athletic director made it clear he’s a big fan of football coach Paul Johnson. Todd Stansbury, who took over at his alma mater this week, erased any doubts about Johnson’s future with a glowing endorsement Wednesday. Stansbury was especially impressed by the final game of the regular season, as Georgia Tech rallied from 13 points down in the fourth quarter to beat rival Georgia 28-27 in Athens.