Fix HTG XML IO Writer takes DepthLimiter parameter
vtkXMLHyperTreeGridWriter takes DepthLimiter parameter of HyperTreeGrid into account only for version 2 of file output.
Extension of testing to cover this aspect of write reduction.
vtkXMLHyperTreeGridWriter takes DepthLimiter parameter of HyperTreeGrid into account only for version 2 of file output.
Extension of testing to cover this aspect of write reduction.