update timestamps of the layer ch.swisstopo.hiks-dufour

git-svn-id: https://svn.bgdi.admin.ch/mf-chsdi/trunk/chsdi@3942 e100092c-b5e6-494f-8bdf-19c1ff2a4001
initial import ch.swisstopo.swisstlm3d-karte-farbe|grau legends refs #4681

git-svn-id: https://svn.bgdi.admin.ch/mf-chsdi/trunk/chsdi@3943 e100092c-b5e6-494f-8bdf-19c1ff2a4001