CHARLOTTE — It was clear that Liza Jackson’s luck had changed when she drove her pearl-white Dodge sedan, the one with the huge pink plastic eyelashes over the headlights, into Pinebrook, an eight-year-old subdivision where residents tend to notice cars with huge pink eyelashes. “There goes the neighborhood,” one homeowner said when she heard that her potential new neighbor had a federal housing voucher known as a Section 8.