calling
Connectivity.vpnConnections.add(VpnConnection.OPENVPN)

gives
2016-02-22 17:34:50,049 - WARNING - void connectivityqt::VpnConnectionsListModel::Priv::addConnectionFinished(QDBusPendingCallWatcher*) "connection.autoconnect: can't set property of type 'gboolean' from value of type 's'"