Never an outfit to shrink from a touchy topic, Long Beach Opera presented The Central Park Five as a hard-hitting, straight-forward narrative, without poetic abstractions or doppelgangers doubling the characters or other tics that today’s new operas tend to overuse. Richard Wesley’s libretto stuck to the historical record and stage director Andreas Mitisek, LBO’s multitasking artistic and general director, made economical use of a collection of walls and doors on casters that also served as screens for projections of period headlines and photos.