fdo#76741 [DOCX] Table Alignment and width type

     There are two issue related to table in the saved(exported) file
     - the table alignment in saved file is "left" instead of "center"
     - the table width type in properties is "auto" instead of "dxa"

     In the issue file alignment was specified in w:tblpXSpec="center"
     and so were missed at import. Added support to fetch
     HORI_ORIENT from frame properties if its not set in Table Properties

     The ::GetTablePageSize returns 0 if the table width is FIXED.
     Modified it to return the tableWidth in such case.

Conflicts:
	writerfilter/source/dmapper/DomainMapperTableHandler.cxx
Reviewed on:
	https://gerrit.libreoffice.org/8846

Change-Id: I02a3af5e9d8ef3746c4d6bec0a07a24e01cc12a4