Convert the Java _XSheetFilterableEx tests to C++ and make changes to
the XSubTotalCalculatable::::testApplyRemoveSubTotals(), because
XSheetFilterableEx::testCreateFilterDescriptorByObject() has to work
with the same sheet.

Change-Id: I89c11bc8f10ec8d2ff4b170aeb9df5a00ca98133
Reviewed-on: https://gerrit.libreoffice.org/44512Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jens Carl <j.carl43@gmx.de>