A Jersey City woman who refused to leave her former workplace in Bayonne has been charged with assaulting a police officer who had ordered her to leave, Bayonne police Capt. Eric Amato said. Tianna Johnson, 22, was arrested Sunday at 2:57 p.m. at the business in the area of 33rd Street and Broadway, Amato said. She was charged with aggravated assault on a police officer, defiant trespass, obstructing a governmental function and resisting arrest. Officers responded to the establishment and saw Johnson screaming at her former employer, Amato said. They asked her to leave the establishment, but J…