Unable to delete a group that has not been approved

[JosteinLindhom]

Before we can delete a group we need to check that it's repository is either empty or does not exist.

For groups that have been created but not approved, no repository has been created. In these cases IsEmptyRepo, which is a precondition for deleting a group, will fail.

func (s *QuickFeedService) isEmptyRepo(ctx context.Context, sc scm.SCM, request *qf.RepositoryRequest) error {
	course, err := s.db.GetCourse(request.GetCourseID(), false)
	if err != nil {
		return err
	}
	repos, err := s.db.GetRepositories(&qf.Repository{
		ScmOrganizationID: course.GetScmOrganizationID(),
		UserID:            request.GetUserID(),
		GroupID:           request.GetGroupID(),
	})
	if err != nil {
		return err
	}
	if len(repos) < 1 {
		return fmt.Errorf("no repositories found")
	}
	return isEmpty(ctx, sc, repos)
}

Returning nil if no record is found may resolve this.