libdnf-0.22.5-5 changed something and now the repos with fake urls are
failing when loaded by test_server.py (they still work fine with
test_projects.py) so only use the 'good' repos with the test_server.py
tests -- the others weren't needed for any of its tests anyway.
Related: rhbz#1678937
Use it for the save, delete, push testing for composer-cli
tests. Otherwise the test runs fine the first time and fails after that
if you don't re-install the test environment.
Related: rhbz#1678937
Stop using fake dnf object, use the real thing. This will help catch
problems with dnf returning unexpected types like VectorString.
(cherry picked from commit 27aff75aa3)
Related: rhbz#1655876
