[NEW-PORT] comms/py-ModbusTCP: Simple Modbus/TCP client for python

[kiwi]

Summary

comms/py-ModbusTCP: Simple Modbus/TCP client for python

This port is a simple modbus TCP client for python.

Approved by:    0mp (mentor)

Test Plan

Portlinted and portclippied.
Tested with poudriere on 14.2-RELEASE (and used on some of my projects)