actually make the exported file valid, related tdf#59663
actually make the exported file valid, related tdf#59663

Change-Id: Icc432d6d3e40be9a6e1956c2d0c1dd2250c273a9

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core