TNL-6186 changes field used in CourseTeamMembership emit to be correct team_id and fixes tests

lms/djangoapps/teams/models.py

@@ -263,5 +263,5 @@ class CourseTeamMembership(models.Model):
         membership.team.save()
         membership.save()
         emit_team_event('edx.team.activity_updated', membership.team.course_id, {
-            'team_id': membership.team_id,
+            'team_id': membership.team.team_id,
         })

lms/djangoapps/teams/tests/test_models.py

@@ -172,7 +172,7 @@ class TeamSignalsTest(EventTestMixin, SharedModuleStoreTestCase):
             self.assertGreater(now, team_membership.last_activity_at)
             self.assert_event_emitted(
                 'edx.team.activity_updated',
-                team_id=team.id,
+                team_id=team.team_id,
             )
         else:
             self.assertEqual(team.last_activity_at, team_last_activity)