properly discard dumped layout on test document (re)loads
properly discard dumped layout on test document (re)loads

Change-Id: I8673810e8c04cd128a691ee1c1e8c4731108b605

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