Re-layout source code to correct namespaces (handlers, commands, etc.)

wolverine/a-frame-architecture/FinancialApi/DomainExceptionHandler.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Threading;
-using System.Threading.Tasks;
 using Microsoft.AspNetCore.Diagnostics;
-using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 
 namespace FinancialApi;