Removed Kentor.AuthServices.IntegrationTests from sln file.
- It should never have been added to the main solution, it was a mistake.
Remember ReturnUrl query parameter from SignIn page and redirect back to that page after an AuthnResponse
Remove link click in integration tests since we now remember and redirect back to the initiating url
Refactor PendingAuthnRequestData into RequestState
Fix code coverage for AcsCommand.Location