So that we see any error output during the tests in "realtime". With
subprocess check=True and capture_output=True on exit_code != 0 no
stderr as part of the exception by default so this change helps
seeing issues from depsolve-dnf more easily.
Extract make_dnf_scafolding as a helper, mostly so that the config_combos()
function is easier to read. It seems one core concept here is the iteration
of "combo[0]" and "combo[1]" so having them symetrical at the same indent
level feel easier to read to me.
Depsolver test that starts a temporary file server and queries it using
osbuild-depsolve-dnf.
Generates all combinations of repositories configured through the
depsolve-dnf request or the repositories directory and runs the test
cases. The results should be the same regardless of combination.
Test repos are defined with a fake gpg key on the request or repo config
and check if it is read correctly and attached to the repo configs in
the response. The name of the repo is appended to each repo's gpg key
so we can make sure that repo option values don't get swapped.
