This code has numerous quality issues and has repeatedly been
a maintenance problem, and also is of questionable usefulness.

It was agreed in the CCB to drop this feature.

This removes the need to use BSD socket calls directly within CI_LAB

Make the patterns in CI better match the patterns used
in other modules (CFE core, Sample App, etc)

- Separate each command into a separate handler function
- Each command handler accepts a const pointer to the full message
- Put Telemetry payload into a separate "Payload" sub-structure
- Use naming conventions defined in conventions document

Note the payload name changes only affect the FSW internal
usage, the payload format for the ground system is not changed.

Add a global structure called "CI_LAB_Global" for all globals, getting
them out of the global namespace.  All other identifiers that remain
in the global namespace should be prefixed consistently with CI_LAB_
to match the name of the app.