Fixing namespaces.

My VS build succeeds even without this change. On CI it seems to fail.

test/MusicStore.Test/CheckoutControllerTest.cs

@@ -9,10 +9,10 @@ using Microsoft.AspNet.Http.Core;
 using Microsoft.AspNet.Http.Core.Collections;
 using Microsoft.AspNet.Mvc;
 using Microsoft.AspNet.Session;
-using Microsoft.AspNet.Testing.Logging;
 using Microsoft.Framework.Caching.Distributed;
 using Microsoft.Framework.Caching.Memory;
 using Microsoft.Framework.DependencyInjection;
+using Microsoft.Framework.Logging.Testing;
 using MusicStore.Models;
 using Xunit;
 

test/MusicStore.Test/ShoppingCartControllerTest.cs

@@ -7,10 +7,10 @@ using Microsoft.AspNet.Http;
 using Microsoft.AspNet.Http.Core;
 using Microsoft.AspNet.Mvc;
 using Microsoft.AspNet.Session;
-using Microsoft.AspNet.Testing.Logging;
 using Microsoft.Framework.Caching.Distributed;
 using Microsoft.Framework.Caching.Memory;
 using Microsoft.Framework.DependencyInjection;
+using Microsoft.Framework.Logging.Testing;
 using MusicStore.Models;
 using MusicStore.ViewModels;
 using Xunit;