Another weekend, more opera performances around the world. Here are the big highlights. Austria  The weekend kicks off at the Vienna state Opera with Janacek’s “Katya Kabanova” starring  Dan Paul Dumitrescu, Misha Didyk, Jane Henschel, Leonardo Navarro and Angela Denoke. It will be followed by Shostakovich’s “Lady Macbeth of Mtsenk” with Wolfgang Bankl, Eva-Maria Westbroek and Brandon Jovanovich. The weekend concludes {…}