A divided City Council decided Tuesday to approve a $21-million parts and services contract to an international auto parts corporation in the midst of opposition from local auto parts businesses.  Staff with the General Services Department said the new five-year contract with the National Auto Parts Association (NAPA) will yield $2 million in savings for the city. After hearing from representatives from several local auto parts companies, the City Council voted 6-3 to approve the contract. Mayor Kevin Johnson and Councilmembers Sandy Sheedy and Kevin McCarty voted against the deal.  “Small business is the backbone of our economy and we have to do everything we can to make sure that we s