* YUM4/DNF compatibility via yum action plugin
DNF does not natively support allow_downgrade as an option, instead
that is always the default (not configurable by the administrator)
so it had to be implemented
- Fixed group actions in check mode to report correct changed state
- Better error handling for depsolve and transaction errors in DNF
- Fixed group action idempotent transactions
- Add use_backend to yum module/action plugin
- Fix dnf handling of autoremove (didn't used to work nor had a
default value specified, now does work and matches default
behavior of yum)
- Enable installroot tests for yum4(dnf) integration testing, dnf
backend now supports that
- Switch from zip to bc for certain package install/remove test
cases in yum integration tests. The dnf depsolver downgrades
python when you uninstall zip which alters the test environment
and we have no control over that.
- Add changelog fragment
- Return a pkg_mgr fact if it was not previously set.
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