Correct two tests that introspect the Gun state

It has changed in Gun 1.2.

test/http_SUITE.erl

@@ -43,7 +43,7 @@ idle_timeout_infinity(Config) ->
 	ConnPid = gun_open([{type, tcp}, {protocol, http}, {port, Port}|Config]),
 	_ = gun:post(ConnPid, "/echo/read_body", [], <<"TEST">>),
 	%% @todo Gun should have a debug function to retrieve the socket.
-	Socket = element(9, element(2,  sys:get_state(ConnPid))),
+	Socket = element(11, element(2,  sys:get_state(ConnPid))),
 	Pid = get_remote_pid_tcp(Socket),
 	Ref = erlang:monitor(process, Pid),
 	receive
@@ -62,7 +62,7 @@ request_timeout_infinity(Config) ->
 	Port = ranch:get_port(name()),
 	ConnPid = gun_open([{type, tcp}, {protocol, http}, {port, Port}|Config]),
 	%% @todo Gun should have a debug function to retrieve the socket.
-	Socket = element(9, element(2,  sys:get_state(ConnPid))),
+	Socket = element(11, element(2,  sys:get_state(ConnPid))),
 	Pid = get_remote_pid_tcp(Socket),
 	Ref = erlang:monitor(process, Pid),
 	receive