Changes in tests proj to not use Log4Net but Serilog

However not sure how this is used to where the output of the logs was viewed when it was set/configured to console - VS Output Window, VSTS Logs?

src/Umbraco.Tests/Testing/UmbracoTestBase.cs

@@ -165,7 +165,7 @@ namespace Umbraco.Tests.Testing
                 Container.RegisterSingleton(f => Mock.Of<ILogger>());
                 Container.RegisterSingleton(f => Mock.Of<IProfiler>());
             }
-            else if (option == UmbracoTestOptions.Logger.Log4Net)
+            else if (option == UmbracoTestOptions.Logger.Serilog)
             {
                 Container.RegisterSingleton<ILogger>(f => new Logger(new FileInfo(TestHelper.MapPathForTest("~/unit-test-log4net.config"))));
                 Container.RegisterSingleton<IProfiler>(f => new LogProfiler(f.GetInstance<ILogger>()));

src/Umbraco.Tests/Testing/UmbracoTestOptions.cs

@@ -6,8 +6,8 @@
         {
             // pure mocks
             Mock,
-            // log4net for tests
-            Log4Net
+            // Serilog for tests
+            Serilog
         }
 
         public enum Database