Fixes failing unit tests due to not resetting Resolution before resetting the actual resolver classes. Now it is automatically impllied that

when you Reset a resolver class, Resolution is un-frozen.

src/Umbraco.Tests/TestHelpers/BaseDatabaseFactoryTest.cs

@@ -63,13 +63,14 @@ namespace Umbraco.Tests.TestHelpers
             var engine = new SqlCeEngine(settings.ConnectionString);
             engine.CreateDatabase();
 
-            Resolution.Freeze();
             ApplicationContext.Current = new ApplicationContext(
 				//assign the db context
 				new DatabaseContext(new DefaultDatabaseFactory()),
 				//assign the service context
 				new ServiceContext(new PetaPocoUnitOfWorkProvider(), new FileUnitOfWorkProvider(), new PublishingStrategy())) { IsReady = true };
-            
+
+            Resolution.Freeze();
+
             //Configure the Database and Sql Syntax based on connection string set in config
             DatabaseContext.Initialize();
             //Create the umbraco database and its base data
@@ -90,7 +91,6 @@ namespace Umbraco.Tests.TestHelpers
 			SqlCeContextGuardian.CloseBackgroundConnection();
 			
 			ApplicationContext.Current = null;
-			Resolution.Reset();
 			RepositoryResolver.Reset();
 
             TestHelper.CleanContentDirectories();