[testrunner] Fix: sections can be None
[testrunner] Fix: sections can be None

graphicore/fontbakery,moyogo/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,googlefonts/fontbakery,graphicore/fontbakery,moyogo/fontbakery,graphicore/fontbakery,googlefonts/fontbakery