Fix Fedora related interaction with pkgdb2

Now using pkgdb2client (from packagedb-cli) instead of python-fedora.

Some minor changes like not pulling EOLed release components
and acls included.

Signed-off-by: Richard Marko <rmarko@fedoraproject.org>
Merge pull request #234 from abrt/pkgdb2_port

Fix Fedora related interaction with pkgdb2