Fixes #6153, bz1107876 - Fixed cv package excludes publish

The package excludes call previously sent the wrong query to pulp. This
commit fixes that.
Honestly i think this should be passed in as the clauses instead of hardcoding it into remove_rpm.  The reason being is if i want to pass ids in as the clauses I can no longer use this. 

For example:

plan_action(Pulp::Repository::RemoveRpm, :pulp_id => repository.pulp_id,
                        :clauses => {:association => {'unit_id' => {'$in' => uuids}}
            })


plan_action(Pulp::Repository::RemoveRpm, :pulp_id => repository.pulp_id,
                        :clauses => {:unit => {'filename' => {'$in' => filenames}}
            })

As this will break app/lib/actions/katello/repository/remove_packages.rb.