Fix IBM MQ test asserting on renamed MessageQueueTrigger attribute

PR #41 renamed MessageQueueTrigger's deprecated broker-URI storage from
self.queue to self.queue_uri to avoid colliding with the new
BaseEventTrigger.queue triggerer-routing attribute, but missed this
provider-local test asserting on the old attribute name.

Author: zach-overflow

providers/ibm/mq/tests/unit/ibm/mq/queues/test_mq.py

@@ -241,7 +241,8 @@ def test_message_queue_trigger_with_deprecated_queue(self):
 
         trigger = MessageQueueTrigger(queue="ibmmq://mq_default/MY.QUEUE.NAME", open_options=32)
         assert trigger.scheme is None
-        assert trigger.queue == "ibmmq://mq_default/MY.QUEUE.NAME"
+        assert trigger.queue_uri == "ibmmq://mq_default/MY.QUEUE.NAME"
+        assert trigger.queue is None
         assert isinstance(trigger.trigger, AwaitMessageTrigger)
         assert trigger.trigger.mq_conn_id == "mq_default"
         assert trigger.trigger.queue_name == "MY.QUEUE.NAME"