channel should respond only with RESPONSE frame
channel should respond only with RESPONSE frame

Summary:
channel used to communicate complete state with REQUEST_CHANNEL frame. That is against
the specification.

Depends on D4860953.

Reviewed By: somasun

Differential Revision: D4861664

fbshipit-source-id: 4cace176de56f6f3d57fe884e16d547f080694ae

vjn/rsocket-cpp,ReactiveSocket/reactivesocket-cpp,ReactiveSocket/reactivesocket-cpp,phoad/rsocket-cpp,alexmalyshev/rsocket-cpp,phoad/rsocket-cpp,rsocket/rsocket-cpp,vjn/reactivesocket-cpp,alexmalyshev/rsocket-cpp,vjn/rsocket-cpp,alexmalyshev/rsocket-cpp,phoad/rsocket-cpp,vjn/rsocket-cpp,rsocket/rsocket-cpp,alexmalyshev/rsocket-cpp,phoad/rsocket-cpp,rsocket/rsocket-cpp,vjn/reactivesocket-cpp,rsocket/rsocket-cpp,vjn/reactivesocket-cpp,ReactiveSocket/reactivesocket-cpp,phoad/rsocket-cpp