4bcd06c235
A bad SDP will be rejected by the WebRTC implementation, so no further publish/subscribe operations should be done on failure. This expands on the idea of https://github.com/OpenVidu/openvidu-tutorials/pull/174 and also simplifies implementations of CustomSdpObserver: there is no need to inherit its methods just for logging, as CustomSdpObserver already logs everything on its default implementation.
