Add logging to HubConnectionHandlerTests (#3286)

...e.Http.Connections.Tests/HttpConnectionDispatcherTests.cs

...Core.Http.Connections.Tests/HttpConnectionManagerTests.cs

...oft.AspNetCore.Http.Connections.Tests/LongPollingTests.cs

...spNetCore.Http.Connections.Tests/ServerSentEventsTests.cs

...soft.AspNetCore.Http.Connections.Tests/WebSocketsTests.cs

...Core.SignalR.Client.FunctionalTests/HubConnectionTests.cs

...SignalR.Client.FunctionalTests/HubProtocolVersionTests.cs

...R.Client.Tests/HttpConnectionTests.ConnectionLifecycle.cs

...ore.SignalR.Client.Tests/HttpConnectionTests.Transport.cs

...ft.AspNetCore.SignalR.Client.Tests/HttpConnectionTests.cs

...oft.AspNetCore.SignalR.Client.Tests/HubConnectionTests.cs

...NetCore.SignalR.Client.Tests/LongPollingTransportTests.cs

...re.SignalR.Client.Tests/ServerSentEventsTransportTests.cs

...Microsoft.AspNetCore.SignalR.Redis.Tests/RedisEndToEnd.cs

...NetCore.SignalR.StackExchangeRedis.Tests/RedisEndToEnd.cs

...soft.AspNetCore.SignalR.Tests.Utils/FunctionalTestBase.cs

...ft.AspNetCore.SignalR.Tests.Utils/VerifiableLoggedTest.cs

...oft.AspNetCore.SignalR.Tests.Utils/VerifyNoErrorsScope.cs

test/Microsoft.AspNetCore.SignalR.Tests/EndToEndTests.cs

...Core.SignalR.Tests/HubConnectionHandlerTestUtils/Utils.cs