He used to be known for being one half of the Atlanta rap group that had people 'shaking like a salt shaker' but now he's known for foolishly swerving on the road drunk and high with his own kids in the car. 33 year old Deongelo ''D-Roc'' Holmes was arrested back on June 1 when police became suspicious he was impaired due to his erratic driving. “He crossed the center line several times," Gwin…