fix: when making a hasty exit from goals, make sure to get the log out

lms/djangoapps/course_goals/management/commands/goal_reminder_email.py

@@ -122,6 +122,8 @@ class Command(BaseCommand):
             self._handle_all_goals()
         except BaseException:  # pylint: disable=broad-except
             log.exception("Error while sending course goals emails: ")
+            for h in log.handlers:
+                h.flush()
             raise
 
     def _handle_all_goals(self):