Make test code unaffected by upcoming loplugin:stringconstant improvements
Make test code unaffected by upcoming loplugin:stringconstant improvements

Change-Id: If375073001690e1ce2f8d18a3f128358f22aa98b

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