Add Support For N-Tron 714FX6 industrial switch

./discovery.php -h HOSTNAME -d | ./pbin.sh
https://p.libren.ms/view/30277b17

./poller.php -h HOSTNAME -r -f -d | ./pbin.sh
https://p.libren.ms/view/d3a5dab0

snmpbulkwalk -OUneb -v2c -c COMMUNITY HOSTNAME . | ./pbin.sh
https://p.libren.ms/view/5339af8e

MIB file
714fx6_mibs.zip

If I missed anything or anyone needs more information please let me know.

(Imported from https://github.com/librenms/librenms/issues/10547, Original request by: @pedjaj)