don't overwrite data bar data if already set, fdo#58336
don't overwrite data bar data if already set, fdo#58336

Change-Id: Ied2d9a80ec96d25a1479c03ac4e925c3be9ac8d1

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