apps.examiner: Updated the tests for Delivery.number_of_deliveries annotation.
apps.examiner: Updated the tests for Delivery.number_of_deliveries annotation.

vegarang/devilry-django,vegarang/devilry-django,devilry/devilry-django,devilry/devilry-django,devilry/devilry-django,devilry/devilry-django