Update content renderer tests.
Update content renderer tests.

learningequality/kolibri,mrpau/kolibri,learningequality/kolibri,learningequality/kolibri,indirectlylit/kolibri,mrpau/kolibri,learningequality/kolibri,mrpau/kolibri,mrpau/kolibri,indirectlylit/kolibri,indirectlylit/kolibri,indirectlylit/kolibri