Fix Resequencer test wait time

https://build.spring.io/browse/INT-MASTERSPRING40-534/

Since we are expecting a message, a large wait time is no detriment
to test runtime and provides a more reliable test on a busy CI server.

spring-integration-core/src/test/java/org/springframework/integration/aggregator/ResequencerTests.java

@@ -392,15 +392,15 @@ public void testTimeoutDontExpire() throws InterruptedException {
 		this.resequencer.handleMessage(message2);
 		Message<?> out1 = replyChannel.receive(0);
 		assertNull(out1);
-		out1 = discardChannel.receive(10000);
+		out1 = discardChannel.receive(10_000);
 		assertNotNull(out1);
-		Message<?> out2 = discardChannel.receive(10);
+		Message<?> out2 = discardChannel.receive(10_000);
 		assertNotNull(out2);
 		Message<?> message1 = createMessage("123", "ABC", 3, 1, null);
 		this.resequencer.handleMessage(message1);
 		Message<?> out3 = discardChannel.receive(0);
 		assertNull(out3);
-		out3 = discardChannel.receive(10000);
+		out3 = discardChannel.receive(10_000);
 		assertNotNull(out3);
 	}