Fixed event listener pileup

refs https://github.com/TryGhost/Toolbox/issues/135

- When instantiating new Urls/Resources object in the UrlService's init on every test suite start it was loosing track of past events (softReset wasn't doing the cleanup properly). Not initializing new classes "fixes" the problem partially, by not loosing track of those event listeners. The real fix should be proper even listener cleanup on every soft reset!

core/server/services/url/UrlService.js

@@ -332,13 +332,8 @@ class UrlService {
         }
 
         if (persistedUrls && persistedResources) {
-            this.urls = new Urls({
-                urls: persistedUrls
-            });
-            this.resources = new Resources({
-                queue: this.queue,
-                resources: persistedResources
-            });
+            this.urls.urls = persistedUrls;
+            this.resources.data = persistedResources;
             this.resources.initResourceConfig();
             this.resources.initEvenListeners();