Add unit test for pdfimport image import.
Add unit test for pdfimport image import.

Change-Id: Ifd51f0c25418085ba8a6e8d331ac5c6d8139d18a

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