J.P. Dumont and Martin Erat combined once again to give the Nashville Predators a spectacular fifth and final lead. Erat scored with 22.2 seconds left to give Nashville a 6-5 victory over the slumping Ottawa Senators on Thursday night. Dumont got his fourth point of the game on the play as he stripped the puck from Ottawa’s Dean McAmmond and fed it to Erat, who beat Martin Gerber from the slot for…