Increase timeout of Trace Sample Test (spring-attic#1186)

Increase timeout of Trace Test to 60 seconds.

Followup to spring-attic#1181.

Author: dzou

spring-cloud-gcp-samples/spring-cloud-gcp-trace-sample/src/test/java/com/example/ApplicationTests.java

@@ -130,7 +130,7 @@ public void testTracesAreLoggedCorrectly() {
 		String logFilter = String.format(
 				"trace=projects/%s/traces/%s", this.projectIdProvider.getProjectId(), uuidString);
 
-		await().atMost(20, TimeUnit.SECONDS)
+		await().atMost(60, TimeUnit.SECONDS)
 				.pollInterval(Duration.TWO_SECONDS)
 				.ignoreExceptions()
 				.untilAsserted(() -> {