Reorganize the websocket test suite

We now have the suite specific modules in the data folder.
Compilation is performed by the Makefile instead of ct_run.

test/ws_SUITE_data/ws_echo_timer.erl

@@ -0,0 +1,31 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+-module(ws_echo_timer).
+-behaviour(cowboy_websocket_handler).
+-export([init/3]).
+-export([websocket_init/3, websocket_handle/3,
+	websocket_info/3, websocket_terminate/3]).
+
+init(_Any, _Req, _Opts) ->
+	{upgrade, protocol, cowboy_websocket}.
+
+websocket_init(_TransportName, Req, _Opts) ->
+	erlang:start_timer(1000, self(), <<"websocket_init">>),
+	Req2 = cowboy_req:compact(Req),
+	{ok, Req2, undefined}.
+
+websocket_handle({text, Data}, Req, State) ->
+	{reply, {text, Data}, Req, State};
+websocket_handle({binary, Data}, Req, State) ->
+	{reply, {binary, Data}, Req, State};
+websocket_handle(_Frame, Req, State) ->
+	{ok, Req, State}.
+
+websocket_info({timeout, _Ref, Msg}, Req, State) ->
+	erlang:start_timer(1000, self(), <<"websocket_handle">>),
+	{reply, {text, Msg}, Req, State};
+websocket_info(_Info, Req, State) ->
+	{ok, Req, State}.
+
+websocket_terminate(_Reason, _Req, _State) ->
+	ok.