Moved all UnitTests to a single project. Implemented parts of AspNetCore UnitTests.

AMWD.Common.AspNetCore/Utilities/BackgroundServiceStarter.cs

@@ -7,6 +7,7 @@ namespace Microsoft.Extensions.Hosting
 	/// Wrapper class to start a background service.
 	/// </summary>
 	/// <typeparam name="TService">The service type.</typeparam>
+	[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
 	public class BackgroundServiceStarter<TService> : IHostedService
 		where TService : class, IHostedService
 	{