DOCX import: default para style has priority over table styles

Since commit 23b67c536537c91020cf5a45ab5cb36d7316ed89 (DOCX import: fix
import of font size in table styles, 2013-03-04) we simply ignored all
table style run props, that indeed fixed testTableStylerPrSz, but broke
cases when otherwise reasonable run properties were specified in table
styles.

Fix this by only ignoring run props of table styles if the default para
style should have priority.

Change-Id: Ic10f635f4b8688af252214d5d38216b4d5c8fa8e