CppunitTest_sw_ooxmlexport: port testTextBoxPictureFill to textboxes
CppunitTest_sw_ooxmlexport: port testTextBoxPictureFill to textboxes

Change-Id: I304c7d7157c4167e7fe33af259e732865900d4ca

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