[SSSD] [sssd PR#380][synchronized] CI: Use dnf 2.0 for installation of packages in fedora

[lslebodn]

   URL: https://github.com/SSSD/sssd/pull/380
Author: lslebodn
 Title: #380: CI: Use dnf 2.0 for installation of packages in fedora
Action: synchronized

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/380/head:pr380
git checkout pr380