OUString: constify and avoid temporaries
OUString: constify and avoid temporaries

Change-Id: I20f049ba275225b6429b630dbff07d0eba5522a3

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