Dr. W. B. Hatcher, president of Louisiana State university, was in New Orleans today conferring with faculty members at the LSU medical school.He met with Dr. George W. McCoy, dean, and other faculty members for several hours.Arrival of a representative of the American Medical Association to study the medical school's curriculum is expected within 10 days, according to Dr. Edgar Hull, assistant dean. The AMA announced it would investigate the medical school last fall during a controversy at the school following a faculty shake-up.