Websocket: enable 'on_open' callback after handshake
Websocket: enable 'on_open' callback after handshake

This patch enable the 'on_open' callback that aims to be triggered
after the handshake process.

Signed-off-by: Eduardo Silva <b6525c140147034c280e3cd2f39161f32f3f4f62@gmail.com>

monkey/duda,monkey/duda