document, with meta:generator of "opxml2odf - Version KO 0.1" has
a styles.xml xmlns of...

xmlns:ofo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0"

instead of the usual xmlns:fo=...

use the importer namespace map to get the importers namespace prefix
for the fastparser namespace uri for the token

Change-Id: Ib633009f6c2b7dae5a3ceb1c921adfff84e21150
Reviewed-on: https://gerrit.libreoffice.org/52720Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>