Changed PublishedContentHelper to use 6.0 APIs instead of relying on the WebBootManager hack to set a delegate.

Fixed up a heap of failing unit tests.

src/Umbraco.Core/CoreBootManager.cs

@@ -98,6 +98,8 @@ namespace Umbraco.Core
             {
                 CanResolveBeforeFrozen = true
             };
+            //dd custom types here that are internal
+            ApplicationEventsResolver.Current.AddType<PublishedContentHelper>();
         }
 
 		/// <summary>