Temporary disabled parallel tests (#128)

Author: ivaylokenov

samples/MusicStore/MusicStore.Test/Properties/AssemblyInfo.cs

@@ -1,5 +1,6 @@
 using System.Reflection;
 using System.Runtime.InteropServices;
+using Xunit;
 
 // General Information about an assembly is controlled through the following
 // set of attributes. Change these attribute values to modify the information
@@ -16,3 +17,5 @@
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("0a3a93a1-a79c-4d08-8ace-6e72b30c3ab7")]
+
+[assembly: CollectionBehavior(DisableTestParallelization = true)]