Update access to deprecated enrollment.course (which now doesn't create the…

Update access to deprecated enrollment.course (which now doesn't create the CourseOverview transparently)

common/djangoapps/student/models.py

@@ -1009,7 +1009,6 @@ class CourseEnrollment(models.Model):
         else:
             self._course_id = value
 
-
     created = models.DateTimeField(auto_now_add=True, null=True, db_index=True)
 
     # If is_active is False, then the student is not considered to be enrolled

lms/djangoapps/certificates/signals.py

@@ -88,11 +88,11 @@ def _listen_for_track_change(sender, user, **kwargs):  # pylint: disable=unused-
     user_enrollments = CourseEnrollment.enrollments_for_user(user=user)
     grade_factory = CourseGradeFactory()
     for enrollment in user_enrollments:
-        if grade_factory.read(user=user, course=enrollment.course).passed:
-            if fire_ungenerated_certificate_task(user, enrollment.course.id):
+        if grade_factory.read(user=user, course=enrollment.course_overview).passed:
+            if fire_ungenerated_certificate_task(user, enrollment.course_id):
                 log.info(u'Certificate generation task initiated for {user} : {course} via track change'.format(
                     user=user.id,
-                    course=enrollment.course.id
+                    course=enrollment.course_id
                 ))