DOCX: Enhacing unit test para auto spacing

Conflicts:
	sw/qa/extras/ooxmlexport/ooxmlexport.cxx

Change-Id: I589b76d0229a3dc4b5822e14399f7dbd9e7a31f8
Reviewed-on: https://gerrit.libreoffice.org/6718
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>