Fix the init_shutdown test

test/http_handler_init_shutdown.erl

@@ -5,12 +5,12 @@
 -export([init/3, handle/2, terminate/2]).
 
 init({_Transport, http}, Req, _Opts) ->
-	Req2 = cowboy_http_req:reply(<<"666 Init Shutdown Testing">>,
+	{ok, Req2} = cowboy_http_req:reply(<<"666 Init Shutdown Testing">>,
 		[{'Connection', <<"close">>}], Req),
 	{shutdown, Req2, undefined}.
 
 handle(Req, State) ->
-	Req2 = cowboy_http_req:reply(200, [], "Hello world!", Req),
+	{ok, Req2} = cowboy_http_req:reply(200, [], "Hello world!", Req),
 	{ok, Req2, State}.
 
 terminate(_Req, _State) ->