Refactor IPublishingStrategy, create IPublishingStrategy2 as a work around, adds EventMessages to IScopeUnitOfWork, ensures all events raised with IPublishingStrategy are done with uow

src/Umbraco.Core/CoreBootManager.cs

@@ -173,8 +173,7 @@ namespace Umbraco.Core
             return new ServiceContext(
                 new RepositoryFactory(ApplicationCache, ProfilingLogger.Logger, dbContext.SqlSyntax, UmbracoConfig.For.UmbracoSettings()),
                 new PetaPocoUnitOfWorkProvider(scopeProvider),
-                new FileUnitOfWorkProvider(scopeProvider),
-                new PublishingStrategy(msgFactory, ProfilingLogger.Logger),
+                new FileUnitOfWorkProvider(scopeProvider),                
                 ApplicationCache,
                 ProfilingLogger.Logger,
                 msgFactory);