Where one would expect the operatic double bill of “Cavalleria Rusticana” and “Pagliacci,” Teatro Comunale di Bologna instead opened last night’s double bill with Poulenc’s “La Voix Humaine” and Mascagni’s ever-famous verismo opera, “Cavalleria Rusticana,” appropriately placed with the approaching Easter season. La Voix Humaine “Voix Humaine,” set to music from Cocteau’s play of the same name, is described as {…}