The share/template/common/internal/html.stw template we have is for
Writer/Web, loading that into Writer is questionable at best. Also it
means that the outline numbering of the heading styles is not set, which
is a problem, as the sw HTML import only sets the style, not the
outline numbering.

Change-Id: I86d11d8a5744c3c2ca71b03fd41a24d3f88ea333
Reviewed-on: https://gerrit.libreoffice.org/49381Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>