when the test fails it was possible that the terminate call was
trying to close all the  open windows which could show the query close
dialog. The new approach is to close all remaining documents in
tearDown.

Change-Id: I0078eaf1995c3085af0bbbb072f636b316003c02
Reviewed-on: https://gerrit.libreoffice.org/31515Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>