Fix flaky AdaptedReactiveMessageConsumerTests

The consumeManyAndAcknowledge() tests has been flaky. This commit
increase the `take` window from 100ms to 200ms to allow the messages to
be emitted.

pulsar-client-reactive-adapter/src/test/java/org/apache/pulsar/reactive/client/internal/adapter/AdaptedReactiveMessageConsumerTests.java

@@ -366,7 +366,7 @@ void consumeManyAndAcknowledge() throws Exception {
 
 		StepVerifier
 			.create(reactiveConsumer.consumeMany((messages) -> messages.map(MessageResult::acknowledgeAndReturn))
-				.take(Duration.ofMillis(100)))
+				.take(Duration.ofMillis(200)))
 			.expectNext(message1)
 			.expectNext(message2)
 			.verifyComplete();