[REVIEW 3-5] fix xlsx height import

[Noel Power]

There are two problems addressed here
firstly for the xlsx importer like the xls importer we really don't want 
to call UpdateAllRowHeights ( which autocalculates row heights ), 
currently when the api property IsAdjustHeightEnabled set to true it 
calls UpdateAllRowHeights. This doesn't live up to the spirit of the 
name of the property and also it is counter productive. ( Note: this api 
property was only created for the filter in the first place because of 
the way the uno api triggers potentially triggers UpdateAllRowHeights 
during import )
Secondly row heights that are specified but that are not marked as 
custom heights are mostly ignored this results in wrong row heights in 
imported documents ( and subsequent layout problems ) ( see 
https://bugs.freedesktop.org/attachment.cgi?id=60991 from fdo#49430 
where Row 2,5,6 etc. are imported at 4.69mm without the patch compared 
to 5.03mm which is what is imported from
https://bugs.freedesktop.org/attachment.cgi?id=60994 ( the xls version 
of the same document ). Additionally there are documents from  attached 
to i#94028 &  i#93609 which don't currently behave well that this patch 
seems to fix ( but as ever happy for a second opinion )


patch attached is a squash ( and backport ) of 
master:764752f5d85cb7c86ad21340dfdda4b62754790c & 
master:1cdfe7519a94d35f3fb47eed3331397cc11129b5

thanks,

Noel