Dump table attributes and page description items

Adds the SwPageDesc name to the dumpAsXml output of the
SwFmtPageDesc / RES_PAGEDESC SfxPoolItem and dumps the tables
attibutes.

Adtittionally this renames the unknown field name, so it doesn't
produce wrong XML output (blamed by "xmllint --format") and adds
the hex node type to the start and end node XML output.

Reviewed on:
	https://gerrit.libreoffice.org/11091

Change-Id: I3cde39d423e17909243675efdd39557a6bfffbd7