Add failure message to wait timeout function

lib/shared/addon/mixins/cattle-transitioning-resource.js

@@ -576,7 +576,7 @@ export default Mixin.create({
       var timeout = setTimeout(() =>  {
         clearInterval(interval);
         clearTimeout(timeout);
-        reject(this);
+        reject(`Failed while: ${ msg }`);
       }, get(this, 'waitTimeout'));
 
       var interval = setInterval(() => {