Moves service to fire on setupController

This fixes the bug:

> The first one is thrown when transitioning between routes with the same name but different params (e.g. from /articles/1 to /articles/2). The error is:

ref mike-north#83

addon/ext/route.js

@@ -1,7 +1,7 @@
 import Mixin from '@ember/object/mixin';
 
 export default Mixin.create({
-  activate() {
+  setupController() {
     this.get('perfService').routeActivated(this);
     this._super(...arguments);
   },