fdo#65882 - fix intermittent writer unit test failure on exit.
fdo#65882 - fix intermittent writer unit test failure on exit.

Change-Id: Iffa4ea724f2192f85df66eaf4e9e4f30e6ba3d4b

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