> Bundle identifier as discussed on the ML

yes - that's the initial bundle identifier;

However, that (bundle id) is unique w/in Apple. That's why @corinnekrych added a hint on, how to change that to the one matching your app ;-) 

Or, if now possible to "reuse" the bundle ID, let's tell folks, that their bundle ID (w/in Apple console) needs to be ```org.jboss.aerogear.unifiedpush.HelloWorld```