Moved System.IO references from DMO classes to Static Helpers

Removed nugetSource from pipeline
Removed more comments
Created Static Classes for most DMO / Controller Classes
Push ConfigurationManager.AppSettings to controller
Align Tests with other Projects

Fab2ApprovalTests/Utilities/EmailUtilitiesTests.cs

@@ -1,3 +1,5 @@
+using System;
+
 using Fab2ApprovalSystem.Models;
 
 using Fab2ApprovalSystem.Utilities;