fix: properly log connection errors

Author: Tom Kirkpatrick

lib/index.js

@@ -56,7 +56,7 @@ module.exports = function loopbackComponentMq(app, settings) {
   rabbit.configure(settings.topology)
     .then(() => debug('Rabbit topology configured'))
     .catch(err => {
-      RabbitMQ.log.error('Unable to configure Rabbit topology', err.cause)
+      RabbitMQ.log.error('Unable to configure Rabbit topology', err)
       process.exit(1)
     })