DOCX import: list styles don't support automatic updates

The problem was the following: setPropertyValue("IsAutoUpdate") on the
style failed -> a number of styles was not imported in
StyleSheetTable::ApplyStyleSheets() due to the exception, then when we
tried to use one of the not imported styles, we also got an exception in
DomainMapper_Impl::finishParagraph(), which resulted in not calling
DomainMapperTableManager::handle(), so multiple cells of the same table
wanted the same range for cell contents, and that resulted in a crash.

Regression from cf33af732ed0d3d553bb74636e3b14c55d44c153 (handle
w:gridBefore by faking cells (fdo#38414), 2014-04-23), but that commit
just made the previously hidden problem visible.

(cherry picked from commit 7c02c7b0216f642074b690cce889f1a02a2ef6b0)

Change-Id: I788cb6b4a2c7b7efbfa48297c658bb26450bf583
Reviewed-on: https://gerrit.libreoffice.org/11068
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>