Cleanup in filter, framework and svtools directory.

Change-Id: Icf4f04cff1207e58ce55ea3dc8c21b0635c3b6ec
Reviewed-on: https://gerrit.libreoffice.org/34298Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>