adding XML import classes to plugin to create new importer
changes to add attributes
work in progress - integrating xsd importer into DataImportService
Work in progress - integration of XSD importer into DataImportService
adding attribute import
adding attributes to xdd import - in progress
latest - WIP
Started new XSD import service test
Re-work of importing files - not yet complete
latest progress
finished v1 of the XSD importer
add models to correct container
Merge branch 'develop' into feature/XMLImport
fixing integration tests
fixing test
Merge branch 'develop' into feature/XMLImport

Conflicts:
	ModelCatalogueCorePlugin/test/integration/org/modelcatalogue/core/SearchISpec.groovy
Merge branch 'feature/XMLImport' into develop