tdf#159102 sw: add missing get_url_for_data_file to the unit test

Partial revert of commit 5fa3abd3b28b7c30d015dc058f7719112003f51e
"tdf#158803 Remove unused imports from uitest".

Follow-up to commit c6d7b7fa686b742c6ffef42aa6cc280358babe0d
"tdf#159102 sw: enable unit test again with extended test document".

Change-Id: Id6397d322f25f1b3e981d8e206a54bb79a54b831
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/169848
Tested-by: Jenkins
Reviewed-by: László Németh <nemeth@numbertext.org>
diff --git a/sw/qa/uitest/writer_tests8/tdf159102.py b/sw/qa/uitest/writer_tests8/tdf159102.py
index 104f2c9..d52fdcb 100644
--- a/sw/qa/uitest/writer_tests8/tdf159102.py
+++ b/sw/qa/uitest/writer_tests8/tdf159102.py
@@ -7,7 +7,7 @@
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
from uitest.framework import UITestCase
from uitest.uihelper.common import get_state_as_dict
from uitest.uihelper.common import get_state_as_dict, get_url_for_data_file
from libreoffice.uno.propertyvalue import mkPropertyValues
from libreoffice.linguistic.linguservice import get_lingu_service_manager