Add 104 to be part of the retry error ECOM-7042

ecommerce_worker/sailthru/v1/tasks.py

@@ -210,8 +210,9 @@ def can_retry_sailthru_request(error):
     """ Returns True if a Sailthru request and be re-submitted after an error has occurred.
 
     Responses with the following codes can be retried:
-         9: Internal Error
-        43: Too many [type] requests this minute to /[endpoint] API
+          9: Internal Error
+         43: Too many [type] requests this minute to /[endpoint] API
+        104: Connection reset by peer
 
     All other errors are considered failures, that should not be retried. A complete list of error codes is available at
     https://getstarted.sailthru.com/new-for-developers-overview/api/api-response-errors/.
@@ -223,7 +224,7 @@ def can_retry_sailthru_request(error):
         bool: Indicates if the original request can be retried.
     """
     code = error.get_error_code()
-    return code in (9, 43)
+    return code in (9, 43, 104)
 
 
 @shared_task(bind=True, ignore_result=True)

ecommerce_worker/sailthru/v1/tests/test_tasks.py

@@ -559,6 +559,12 @@ class SailthruTests(TestCase):
         self.assertFalse(_update_unenrolled_list(mock_sailthru_client, TEST_EMAIL,
                                                  self.course_url, False))
 
+        mock_sailthru_client.reset_mock()
+        # simulate retryable error
+        mock_sailthru_client.api_get.return_value = MockSailthruResponse({}, error='Connection reset by peer', code=104)
+        self.assertFalse(_update_unenrolled_list(mock_sailthru_client, TEST_EMAIL,
+                                                 self.course_url, False))
+
         # test get error from Sailthru
         mock_sailthru_client.reset_mock()
         # simulate unretryable error