Thoughts on this addition would be most welcome.

@openhab/openhabian-maintainers, just an FYI - this may be useful to call when calling openHABians update functions.

@kaikreuzer, I've added this function in preparation for two events:

1. We change the suggested testing repo to Artifactory, we can update Bintray with a final package that has an updated source template, and then users need only use the command openhab-cli update-repo testing (or we can do this for them).

2. The public key expires on 2019-07-25, ahead of this time we should probably update the public key. I have included a copy of it in this repo so that we can replace it if needed.

Just noticed that this is more than 1 year old by now...
@BClark09 Are you still waiting for having it merged by a @openhab/linuxpkg-maintainers? As there are just 2, I guess you can decide to allow self-merging of PRs (at least after a few days), wdyt?

I'm in maintenance mode ;-) . @BClark09 is the master and should not wait for my lgtm.

As there are just 2, I guess you can decide to allow self-merging of PRs (at least after a few days), wdyt?

Sounds fair, but I think it would also make sense to request that for any PR that may affect openHABian that there should be a review from another person in @openhab/openhabian-maintainers. I'll request a review for next time.

As for the PR I think there's probably a better approach to this than what I submitted all that time ago so I'll close this for now in favour of submitting a different one.