Attempt to see if the error itself can give us a little more information

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>

callback_plugins/fedora_messaging_callback.py

@@ -102,6 +102,7 @@ class CallbackModule(CallbackBase):
                 except ConnectionException as e:
                     LOGGER.warning("Error sending message %s: %s", msg.id, e)
                     print("Error sending message %s: %s", msg.id, e)
+                    print(e)
                 self.playbook_path = path
 
     def v2_playbook_on_stats(self, stats):