Various BATS tests fail on Ubuntu

[mstormi]

Telldus because of outdated repo to still refer to stretch?
wireguard because of missing dnsutils

We should consider dropping Ubuntu support or to be more specific in that these addons will not be supported on Ubuntu.
@ecdye @holgerfriedrich wdyt?

[ecdye]

This was your desire, to support Ubuntu, if you feel that it is not wise to add official support for it at the moment, I see not issue with that.

[mstormi]

Desire, well ... am I right that none of us (you, me, @holgerfriedrich) has access to an Ubuntu development box ?
(other than that in Travis, but that's awkward trial-and-error if not interactively useable).
About the code, ok we should try to keep it Ubuntu compatible. But we cannot actively test against Ubuntu.
Adding these BATS tests somewhat opened my eyes. So many of the optional components that fail to run and that we never even tried to run/test before.
I think we cannot and therefore should not reliably promise "support" for Ubuntu. We can provide it "as-is", though.

[ecdye]

I think we cannot and therefore should not reliably promise "support" for Ubuntu. We can provide it "as-is", though.

That sounds good to me.

[mstormi]

See my docs changes from #1164 and let me know if I need to change anything about it again.

[mstormi]

See https://community.openhab.org/t/openhab-logviewer-died-on-me-solved/106021/19
(openhabian group missing makes frontail fail to install)

I'd think that a lot of these issues could be related to the code that renames the existing administration user (group, too?) into "openhabian". That exists in the RaspiOS image but likely not on Ubuntu.

[holgerfriedrich]

Just to summarize what I noticed yesterday:

• homegear failing because 20.04 dropped python-lzo package
• telldus failing because of stretch repo (anyway, there is no libconfuse1 available....) -> workaround building it on your own described in the forum, I don't want to integrate to openHABian https://community.openhab.org/t/solved-telldus-core-depends-on-libconfuse-but-it-is-not-installable/89856/14