As the smart package manager is not supported under python3, we're
migrating the patch-agent to use the python2 DNF libraries in
preparation for CentOS 8. This impacts how the patch-agent queries the
repos and manages installed software, but is done without changing how
the patch-agent and patch-controller exchange information, to ensure
we don't impact cross-version communication in an upgrade scenario.
Depends-On: https://review.opendev.org/700960
Change-Id: I00729a487c24ba5c182a9a2a48e2024be9260978
Story: 2006227
Task: 37932
Signed-off-by: Don Penney <don.penney@windriver.com>
44cdc55fd8