Improved test files for CombinedXmlSchemaDefinitionTest Related to Issue [WTI-1157]git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@8708 5a3db67b-de53-47b5-99c8-a1c30a6650e2Former-commit-id: 44b64cde8a83bac1a5ae13352a1b1abf03327139Former-commit-id: 88fe31fd3047d92b402ae7ccf060c5488f28e949