Stax reader adding a namespace and version check if <versionDefinition> is present

[andrzejj0]

This came up when I tried moving from Xpp3 to Stax for our Modello readers in Versions Maven Plugin. It turns out that modello-stax adds a namespace- and version check in the generated Stax parser while it does not do so in other flavours of the parser.

See StaxReaderGenerator.java#L217

VersionDefinition versionDefinition = objectModel.getVersionDefinition();
if (versionDefinition != null && versionDefinition.isNamespaceType()) {
    sc.add("String modelVersion = getVersionFromRootNamespace( xmlStreamReader );");

    writeModelVersionCheck(sc);
}

Perhaps there should come a new optional parameter to make the check optional and also consistent with other parsers?