title: How to add a global exception handler/logger once in Mule
body: <p>We want to add a few lines of XML config to mule with an exception handler that logs to SLF4J instead of where they log right now (stdout). How do we add this?</p>
  
  <p>We do NOT want to have to add this handler to every single flow (50+ flows, plus as people add flows, they may forget to add our exception handler).</p>