[fix][test] Fix flaky test PersistentStreamingDispatcherBlockConsumerTest.testBrokerSubscriptionRecovery

[RobertIndie]

、

Fixes #17011

Motivation

pulsar/pulsar-broker/src/test/java/org/apache/pulsar/client/api/DispatcherBlockConsumerTest.java

Lines 648 to 658 in 1bf9a26

	for (int i = 0; i < totalProducedMsgs; i++) {
	Message<?> msg = consumer.receive(500, TimeUnit.MILLISECONDS);
	if (msg == null) {
	break;
	}
	receivedMsgs.add(new String(msg.getData()));
	}
	// there is no guarantee when a messages is acknowledged when consumer.acknowledge is called.
	// consumer.acknowledge only guarantees that an ack request is sent to the wire. so we can
	// only check all unackMsgs will be redelivered.
	unackMsgs.forEach(msg -> assertTrue(receivedMsgs.contains(msg)));

From the test, we can observe that the consumer can receive the full number of messages, but the received messages are not complete. There may be duplicate messages in the topic, and we need to enable the deduplication.

Modifications

Enable the broker deduplication for the PersistentStreamingDispatcherBlockConsumerTest.

Documentation

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[poorbarcode]

I found another problem:

• Messages are received out of order. see #17418

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