Support for 16GB Compute Module 5

[pjbosco]

Pi4J currently does not support the 16GB variant of the Compute Module 5 because the BoardModel enum has incorrect revision codes for the COMPUTE_5 instance. The correct revision codes can be found here.

I have forked Pi4J and updated the BoardModel enum's COMPUTE_5 instance with the correct revision codes for CM5 and CM5 Lite based on the documentation linked above. I have also updated the remarks for the instance to include the url of the documentation linked above for reference.

Changes are here.

I figured I would reach out in the discussion first before creating a new issue or pull request to gauge interest in this change.

[FDelporte]

Thanks a lot @pjbosco ! Please continue with a pull request...