Make it possible to filter repositories not matching the license.

Change-Id: I8ca36004394778ecd680636b36bfeafe8fcd1ff8
Reviewed-by: Niels Weber <niels.weber@digia.com>
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>