Giuseppe Verdi's rapidly complicated, frequently histrionic, infrequently performed opera Ernani plays like a telenovela on fast-forward with the volume turned up. Opera Boston's production, which opened Friday night at the Majestic Theatre, is exactly what you think opera looks like: there's candelabra, and wigs, or hair carefully styled to look like wigs, and more red velvet than David Lynch could shake a stick at. The labyrinthine plot—a story of imperial intrigue overshadowed by a......