Use Poco::AutoPtr for xml docs, node lists and new elements, re #8511
More Poco::AutoPtr in case, re #8511
Use Poco::AutoPtr in several vtkDataSet... classes, re #8511
missing poco header, re #8511
Merge remote-tracking branch 'origin/bugfix/8511_unreleased_poco_xml_document_nodelists_in_vates'