Make test independent of online XSD schema

The test still needs to access <http://www.w3.org/2009/01/xml.xsd>, but
at least we no longer depend on <http://x-road.eu/xsd/x-road.xsd>,

Make test independent of online XSD schema

The test still needs to access <http://www.w3.org/2009/01/xml.xsd>, but
at least we no longer depend on <http://x-road.eu/xsd/x-road.xsd>,
which may be moved again.

show more ...