Use dedicated method to turn off authentication

See gh-18538

Author: michael-simons

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/data/neo4j/DataNeo4jTestIntegrationTests.java

@@ -46,7 +46,7 @@
 class DataNeo4jTestIntegrationTests {
 
 	@Container
-	static final Neo4jContainer<?> neo4j = new Neo4jContainer<>().withAdminPassword(null);
+	static final Neo4jContainer<?> neo4j = new Neo4jContainer<>().withoutAuthentication();
 
 	@Autowired
 	private Session session;