Refactoring and Adding Tests (#58)

* Moving Identity seeding to its own class and method.

* Adding tests for AddItem

* Added catalog api controller and functional tests
Added and cleaned up some comments

* Adding integration tests for OrderRepository

* Getting integration test for order working with inmemory db

src/ApplicationCore/Services/UriComposer.cs

@@ -12,7 +12,6 @@ namespace ApplicationCore.Services
         public string ComposePicUri(string uriTemplate)
         {
             return uriTemplate.Replace("http://catalogbaseurltobereplaced", _catalogSettings.CatalogBaseUrl);
-
         }
     }
 }