fix(TUP-24954): Error "XML format is incorrect", when customer try to define a 'File XML metadata' using a XSD file https://jira.talendforge.org/browse/TUP-24954
This plugin is based on the old code we used from org.eclipse.datatools. Only few classes from original datatools remain since we used very few. A new plugin has been created since we customized too much the original code of datatools. Original copyright has been kept.