Update region_config_filenames.py

[KevinWassermann94]

temporary fix for the packetforwarder not loading the region override. The old ones can be removed after the testnet is running on the same region override

Why units are not receiving the region override after a reboot

How

References

[marvinmarnold]

This is great work. But things are all messed up now because production isn't running master branch. This PR should be superseded by: https://github.com/NebraLtd/helium-miner-software/pull/199

[shawaj]

Looks like this has been reverted https://github.com/helium/blockchain-core/pull/1080