Fix VCRReplayingURLProtocol to replay errors
Fix VCRReplayingURLProtocol to replay errors

The VCRReplayingURLProtocol was always replaying a successful connection even if an error was recorded.

tclarkwilliam/VCRURLConnection,areedtomlinson/VCRURLConnection,areedtomlinson/iOS-VCR,areedtomlinson/iOS-VCR-Deprecated,foulkesjohn/VCRURLConnection,dstnbrkr/VCRURLConnection