Improving network traffic in Guacamole protocol

[changkun]

Describe the bug
This CL reverts the network traffic improvements since it breaks the connection sharing feature: ad688ff

This is due to the connection between occamy and removes desktop needs regular connection, and if an owner-user doesn't do anything then the joiner cannot see anything (frame is not refreshed until the owner made some progress). This means a desktop may never be connected to occamy due to the owner's connection may get lost.

We need to do a more detailed investigation of the solution of reducing the network traffic.

Related issues:

• Eliminate handshake process in Guacamole protocol #2
• Redesign protocol instructions #3