timezone tests: do not restore original timezone if it wasn't known (value 'n/a') (#7476)
Do not restore original timezone if it wasn't known (value 'n/a').
(cherry picked from commit 57e36d7dc2)
Co-authored-by: Felix Fontein <felix@fontein.de>
* Add Fedora 32 to CI; drop Fedora 30 which is soon EOL.
* Docker only supports Fedora up to 31; fortunately the 31 package seems to work for 32 too.
* Also skip for Fedora 32, as it apparently has a similar problem to Fedora 31.
ci_complete