Fix unit tests and fix content type for WMTS service


git-svn-id: https://svn.bgdi.admin.ch/mf-chsdi/trunk/chsdi@3770 e100092c-b5e6-494f-8bdf-19c1ff2a4001
add news layers ch.swisstopo.geoidmodell-*

git-svn-id: https://svn.bgdi.admin.ch/mf-chsdi/trunk/chsdi@3771 e100092c-b5e6-494f-8bdf-19c1ff2a4001
Update for astra -> Replace the timestamp of IVS layer

git-svn-id: https://svn.bgdi.admin.ch/mf-chsdi/trunk/chsdi@3772 e100092c-b5e6-494f-8bdf-19c1ff2a4001