Merge pull request #1439 from anderson-dan-w/redrive-policy

Redrive policy

moto/sqs/models.py

@@ -166,6 +166,7 @@ class Queue(BaseModel):
                             'MessageRetentionPeriod',
                             'QueueArn',
                             'ReceiveMessageWaitTimeSeconds',
+                            'RedrivePolicy',
                             'VisibilityTimeout',
                             'WaitTimeSeconds']
     ALLOWED_PERMISSIONS = ('*', 'ChangeMessageVisibility', 'DeleteMessage', 'GetQueueAttributes',
@@ -285,6 +286,8 @@ class Queue(BaseModel):
             attr = getattr(self, camelcase_to_underscores(attribute))
             if isinstance(attr, bool):
                 attr = str(attr).lower()
+            elif attribute == 'RedrivePolicy':
+                attr = json.dumps(attr)
             result[attribute] = attr
         return result