By Michael Najarian NEFJ Correspondent CHELMSFORD — Westford Academy’s offense had been contained for the entire first half, with the game beginning to the tune of the ghostbusters song playing over the loudspeakers at Simonian Stadium. It was the Ghosts who had the last laugh, however, as Sam Bramanti’s 10-yard touchdown catch with 3:39 left and Nolan Kropp’s interception in the end zone with 16 seconds left gave Westford a...