[ccbnext-53] change from xml.item.pageLabel to xml.pagelabel
[ccbnext-53] change from xml.item.pageLabel to xml.pagelabel

  In the new API the node pagelabel is child of cortex item's view
  xml, *not* child of item node in cortex item's view.

Deutsche-Digitale-Bibliothek/ddb-next,Deutsche-Digitale-Bibliothek/ddb-next,Deutsche-Digitale-Bibliothek/ddb-next