Added Test for tdf#91145 Set Cell Background Color
Added Test for tdf#91145 Set Cell Background Color

Change-Id: I7c41f1d596946706dde4adbeb5434ae0be58b04b

Reviewed-by: Michael Stahl <eef8671db506f9731c0438a7613853b6391ca841@redhat.com>

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