cleanup code unwantedly removes references to autogenerated controller

Author: maurei

Diff for: test/OpenApiTests/OpenApiTestContext.cs

@@ -1,6 +1,7 @@
 using System.Text.Json;
 using JetBrains.Annotations;
 using Microsoft.EntityFrameworkCore;
+using OpenApiTests.Controllers;
 using TestBuildingBlocks;
 using Xunit;