apps.administrator.simplified: Updated AssignmentGroup tests with latest_delivery_id.
apps.administrator.simplified: Updated AssignmentGroup tests with latest_delivery_id.

However the tests still does not pass because status is off.

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