Revert "Ignore test affect by a regression in Spring Data Lovelace"

This reverts commit d9215d5714.

Closes gh-13784

spring-boot-samples/spring-boot-sample-session-webflux/src/test/java/sample/session/SampleSessionWebFluxApplicationTests.java

@@ -18,7 +18,6 @@ package sample.session;
 
 import java.util.Base64;
 
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -49,7 +48,6 @@ public class SampleSessionWebFluxApplicationTests {
 	private WebClient.Builder webClientBuilder;
 
 	@Test
-	@Ignore
 	public void userDefinedMappingsSecureByDefault() throws Exception {
 		WebClient webClient = this.webClientBuilder
 				.baseUrl("http://localhost:" + this.port + "/").build();