ChrotScan Enabled on copr-builders

[Michal Novotny]

Hello!

To tackle the latest problems with synchronizing Fedora repos, we have
employed mocks' ChrootScan plugin
<https://github.com/rpm-software-management/mock/wiki/Plugin-ChrootScan> on
builders to tackle them. It will take a bit of time until 'chroot_scan'
directory with dnf logs (especially dnf.librepo.log is important) will
start occurring as new builders need to be spawned first that have the
updated mock config.

Hopefully we will be able to sort those issues out
Let us know if you encounter a problem with repo synchronization
Best regards
COPR team