By Joseph Ax LAWRENCE, N.J. (Reuters) -Last year, Xavier Rodriguez got two convictions for marijuana possession expunged from his record, thanks to a new law legalizing the drug in New Jersey. On Thursday, the 28-year-old was among the initial wave of New Jerseyans waiting in long lines to buy marijuana lawfully, as 13 dispensaries around the state began selling to all residents 21 and older for the first time. “No more being hassled and having to hide out,” said Rodriguez, standing outside the Zen Leaf dispensary in Lawrence, New Jersey, with his 60-year-old mother, Debra, who uses marijuana …