Description of problem:

I have a few packages pinned to particular versions with the dnf versionlock plugin, but PackageKit still wants to upgrade them

Version-Release number of selected component (if applicable):

PackageKit-1.0.11-1.fc23.x86_64

How reproducible:

Always

Steps to Reproduce:
1. dnf install 'dnf-command(versionlock)'
2. dnf versionlock add <some component with updates available>
3. wait for next PackageKit pending update notification

Actual results:

dnf considers the pinned components up to date, PackageKit doesn't and wants to update them

Expected results:

Neither dnf nor PackageKit tries to upgrade the pinned components

Additional info:

This shouldn't require merged metadata caches, just PackageKit being aware of the DNF plugin's list of pinned packages:

$ cat /etc/dnf/plugins/versionlock.list 

# Added locks on Tue Apr 19 23:19:06 2016
docker-1:1.10.2-9.git0f5ac89.fc23.*
docker-selinux-1:1.10.2-9.git0f5ac89.fc23.*
docker-v1.10-migrator-1:1.10.2-9.git0f5ac89.fc23.*
docker-forward-journald-1:1.10.2-9.git0f5ac89.fc23.*

Plugin docs: http://dnf-plugins-extras.readthedocs.org/en/latest/versionlock.html