fdo#43249: WW8: fix double border import:
fdo#43249: WW8: fix double border import:

The border widths are tripled on import, because that is effectively
what SetWidth does for DOUBLE borders; set a divisor of 3 similar to
e2ffb71305c5f085eec6d396651c76d6daee3406
70a6a4d425558340bb49507975343a3e0a1bdde8

Change-Id: I40b175bedc1ed2d564be126bf9e6870b43474aba

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