test_ogrsf: turn failure on huge coords spatial filter as a warning, to avoid issue with CartoDB autotest (CartoDB BOX3D parser doesn't like apparently exponents)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26756 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_with_coverage