FakeAhcResponse

A simulated response from the async-http-client.

The play.api.libs.ws.ahc.AhcWSResponse is intended to wrap this.

Implementation is mostly based upon org.asynchttpclient.netty.NettyResponse.

We're faking at this level as opposed to the play.api.libs.ws.WSResponse level to preserve any behavior specific to the NingWSResponse which is likely to be used in the real (non-fake) WSClient.