[Service Bus] fix deadletter sample + update README (Azure#18261)

(potential) fix for deadletter_messages_and_correct.py sample timeout exceeded error (over 300 minutes).
fixes: Azure#18207

Author: swathipil

sdk/servicebus/azure-servicebus/samples/README.md

@@ -85,6 +85,8 @@ Both [sync version](https://github.com/Azure/azure-sdk-for-python/tree/master/sd
     - List rule
     - Get rule properties
 - [failure_and_recovery.py](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/servicebus/azure-servicebus/samples/sync_samples/failure_and_recovery.py) - A demonstration of potential failure modes from an end-to-end send receive flow, as well as possible recovery patterns.
+- [deadletter_messages_and_correct.py](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/servicebus/azure-servicebus/samples/sync_samples/deadletter_messages_and_correct.py) ([async_version](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/servicebus/azure-servicebus/samples/async_samples/deadletter_messages_and_correct_async.py)) - Comprehensive example of moving messages to the dead-letter queue, retrieving messages from it, and resubmitting corrected messages back into main queue.
+- [topic_subscription_with_rule_operations.py](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/servicebus/azure-servicebus/samples/sync_samples/topic_subscription_with_rule_operations.py) ([async_version](https://github.com/Azure/azure-sdk-for-python/tree/master/sdk/servicebus/azure-servicebus/samples/async_samples/topic_subscription_with_rule_operations_async.py)) - Example to manage rules on topic subscriptions and to explore different forms of subscription filters.
 
 ## Prerequisites
 - Python 2.7, 3.6 or later.

sdk/servicebus/azure-servicebus/samples/async_samples/deadletter_messages_and_correct_async.py

@@ -50,7 +50,7 @@ async def exceed_max_delivery(servicebus_client):
             received_msgs = await receiver.receive_messages(max_wait_time=5)
 
     async with dlq_receiver:
-        received_msgs = await dlq_receiver.receive_messages(max_message_count=10)
+        received_msgs = await dlq_receiver.receive_messages(max_message_count=10, max_wait_time=5)
         for msg in received_msgs:
             print("Deadletter message:")
             print(msg)
@@ -59,7 +59,7 @@ async def exceed_max_delivery(servicebus_client):
 async def receive_messages(servicebus_client):
     receiver = servicebus_client.get_queue_receiver(queue_name=QUEUE_NAME)
     async with receiver:
-        received_msgs = await receiver.receive_messages(max_message_count=10)
+        received_msgs = await receiver.receive_messages(max_message_count=10, max_wait_time=5)
         for msg in received_msgs:
             if msg.subject and msg.subject == "Good":
                 await receiver.complete_message(msg)
@@ -77,7 +77,7 @@ async def fix_deadletters(servicebus_client):
                                                         sub_queue=ServiceBusSubQueue.DEAD_LETTER)
     msgs_to_send = []
     async with dlq_receiver:
-        received_dlq_msgs = await dlq_receiver.receive_messages(max_message_count=10)
+        received_dlq_msgs = await dlq_receiver.receive_messages(max_message_count=10, max_wait_time=5)
         for msg in received_dlq_msgs:
             if msg.subject and msg.subject == "Bad":
                 msg_copy = ServiceBusMessage(str(msg), subject="Good")
@@ -88,7 +88,7 @@ async def fix_deadletters(servicebus_client):
         print("Resending fixed messages")
         await sender.send_messages(msgs_to_send)
     async with receiver:
-        received_msgs = await receiver.receive_messages(max_message_count=10)
+        received_msgs = await receiver.receive_messages(max_message_count=10, max_wait_time=5)
         for msg in received_msgs:
             if msg.subject and msg.subject == "Good":
                 print("Received fixed message: Body={}, Subject={}".format(next(msg.body), msg.subject))

sdk/servicebus/azure-servicebus/samples/sync_samples/deadletter_messages_and_correct.py

@@ -48,7 +48,7 @@ def exceed_max_delivery(servicebus_client):
             received_msgs = receiver.receive_messages(max_wait_time=5)
 
     with dlq_receiver:
-        received_msgs = dlq_receiver.receive_messages(max_message_count=10)
+        received_msgs = dlq_receiver.receive_messages(max_message_count=10, max_wait_time=5)
         for msg in received_msgs:
             print("Deadletter message:")
             print(msg)
@@ -57,7 +57,7 @@ def exceed_max_delivery(servicebus_client):
 def receive_messages(servicebus_client):
     receiver = servicebus_client.get_queue_receiver(queue_name=QUEUE_NAME)
     with receiver:
-        received_msgs = receiver.receive_messages(max_message_count=10)
+        received_msgs = receiver.receive_messages(max_message_count=10, max_wait_time=5)
         for msg in received_msgs:
             if msg.subject and msg.subject == "Good":
                 receiver.complete_message(msg)
@@ -75,7 +75,7 @@ def fix_deadletters(servicebus_client):
                                                         sub_queue=ServiceBusSubQueue.DEAD_LETTER)
     msgs_to_send = []
     with dlq_receiver:
-        received_dlq_msgs = dlq_receiver.receive_messages(max_message_count=10)
+        received_dlq_msgs = dlq_receiver.receive_messages(max_message_count=10, max_wait_time=5)
         for msg in received_dlq_msgs:
             if msg.subject and msg.subject == "Bad":
                 msg_copy = ServiceBusMessage(str(msg), subject="Good")
@@ -86,7 +86,7 @@ def fix_deadletters(servicebus_client):
         print("Resending fixed messages")
         sender.send_messages(msgs_to_send)
     with receiver:
-        received_msgs = receiver.receive_messages(max_message_count=10)
+        received_msgs = receiver.receive_messages(max_message_count=10, max_wait_time=5)
         for msg in received_msgs:
             if msg.subject and msg.subject == "Good":
                 print("Received fixed message: Body={}, Subject={}".format(next(msg.body), msg.subject))