Upgrade WebSocket libraries

[j1elo]

• Java: io.netty libraries.

• Javascript: websocket-stream used by KurentoForks/reconnect-ws (https://groups.google.com/d/topic/kurento/AvUgqLd5_Nc/discussion)

• C++: websocketpp library in Kurento Media Server: remove custom fork (in-place source code at path kurento-media-server/server/transport/websocket/websocketpp), instead use system package libwebsocketpp-dev.
  DONE in commit Kurento/kurento-media-server@f39f530

[agonza1]

It seems to be related with this:
progre/reconnect-ws#1
and
Kurento/kurento-jsonrpc-js#1

[JoseGoncalves]

Upgrading websocket-stream to v3.3.3 works for me and removes the vulnerabilities reported by npm with the old ws version that is currently pulled.

Tried to upgrade to latest websocket-stream (v5.5.0) with no success.
See my comments in KurentoForks/reconnect-ws#2.

[j1elo]

Related: #373

[j1elo]

Using #439 to track this.