Implementation of a new launcher that opens one vnc server with 3 clients noVNC

[marcosto29]

This functionality adds a launcher that makes possible to open only one server VNC that uses 3 clients noVNC, to launch it, this configuration is needed on the RAM: https://pastebin.com/JYmjsnYZ.

also, since this server only uses one display, in RoboticsApplicationsWrapper.py the display must be changed from 2 to 0.

This is only meant to be an extra functionality and is not necessary, just to explore some optimization problems.

[marcosto29]

this is the launcher necessary: https://pastebin.com/MQnzNvtP that needs to be added in RoboticsApplicationManager/manager/manager/launcher/ and needs to be named launcher_mix.py.