And use less ColorData in writerfilter and xmloff.

part of removing ColorData.

Change-Id: Ia1c57bf837ae814e7642cf1c7de2eb7ada7a1500
Reviewed-on: https://gerrit.libreoffice.org/50028Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>