A Department of Education school cleaner was busted yesterday for sexually abusing a 14-year-old student at her Brooklyn school, officials said. Raymond Morales, 22, was picked up at JHS 126 on Leonard Street in Greenpoint at 3:30 p.m., a couple of hours after fondling the girl's breast and buttocks, cops said. It was not known where in the school the alleged incident took place. Morales apparently gave the girl a hickey on her neck during the encounter. The girl told her mother about the incident, prompting her to report Morales to school officials who then called the cops. Morales was...