remove kea_connector2.py kea_connector3.py
it's been over 2.5 years since python2 was eoled, maybe it's time to get rid of kea_connector2.py kea_connector3.py and put python3 support into kea_conn.py
it's been over 2.5 years since python2 was eoled, maybe it's time to get rid of kea_connector2.py kea_connector3.py and put python3 support into kea_conn.py