(Credit: Richard Hubert Smith) Last week the English Touring Opera launched its spring tour. The tour includes “St. John Passion,” Rismky-Korsakov’s “The Golden Cockerel” at the opera’s London home of the Hackney Empire, and a revival of Puccini’s “La bohème.” James Conway’s production will be touring a myriad of venues until early June with Rodolfo, Marcello, Musetta, and Mimi double-cast. {…}