Improved control loop timing

Description

• ThreadSleep for CoAP server set to 0 ms (improves performance).
• RobotController updates based on number of messages in between
• Updated ForceOutputTest to support new timing stats in the group/debug message.
• Updated GroupDebug to support new timing stats in the group/debug message.
• ForceOutputTest now clears terminal and does not throw as many fatal exceptions (can now cutoff lines that there is no room for, previously just excepted)
• Unsubscribe () function added which unsubscribes from all
• Updated RobotClient to support changes

What to focus on

• put content here.

Reviewers

• @cw
• @amyblank
• @bz
• @ps

Resources

• Related to burt/firmware/burt-firmware!184

Here are the CoAP control loop rates after these fixes:

Issues

What issues does this fix?

• Fixes #77