Trustees of Beverly (MA) Hospital's parent organization met to determine the future of chief executive Stephen R. Laverty, whose management style has come under fire from doctors and nurses. The board is believed to be looking for an interim CEO to run Beverly Hospital, Addison Gilbert Hospital in Gloucester, BayRidge Hospital in Lynn, and three outpatient facilities during a search for a permanent replacement. A spokeswoman for Northeast said she had no information about the meeting.