Fixed issue with default identifiers

The `FakeRepository` was updated to assign `Id`s to the `Root:Web` and its children, in order to support the `LayoutController_Menu` test. This disrupted the `ITopicRepositoryTest_SaveTest` test. To mitigate this, the latter was updated to test the `Id`s of the `Root:Configuration` instead (which retains the default values of `-1`).

Author: JeremyCaney

Ignia.Topics.Tests/ITopicRepositoryTest.cs

@@ -80,18 +80,17 @@ public void ITopicRepository_SaveTest() {
       var web                   = _topicRepository.Load("Root:Web");
       var configuration         = _topicRepository.Load("Root:Configuration");
 
-      Assert.AreEqual<int>(-1, web.Id);
+      Assert.AreEqual<int>(10000, web.Id);
       Assert.AreEqual<int>(-1, configuration.Id);
 
-      _topicRepository.Save(web);
+      _topicRepository.Save(configuration);
 
-      Assert.AreNotEqual<int>(-1, web.Id);
-      Assert.AreEqual<int>(-1, web.Children.First().Id);
+      Assert.AreNotEqual<int>(-1, configuration.Id);
+      Assert.AreEqual<int>(-1, configuration.Children.First().Id);
 
-      _topicRepository.Save(web, true);
+      _topicRepository.Save(configuration, true);
 
-      Assert.AreNotEqual<int>(-1, web.Children.First().Id);
-      Assert.AreEqual<int>(-1, configuration.Id);
+      Assert.AreNotEqual<int>(-1, configuration.Children.First().Id);
 
     }