Use http security nested builder in samples

Issue: gh-5557

samples/javaconfig/preauth/src/main/java/org/springframework/security/samples/config/SecurityConfig.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,12 +26,15 @@ public class SecurityConfig extends WebSecurityConfigurerAdapter {
 	@Override
 	protected void configure(HttpSecurity http) throws Exception {
 		http
-			.authorizeRequests()
-				.antMatchers("/login", "/resources/**").permitAll()
-				.anyRequest().authenticated()
-				.and()
-			.jee()
-				.mappableRoles("USER", "ADMIN");
+			.authorizeRequests(authorizeRequests ->
+				authorizeRequests
+					.antMatchers("/login", "/resources/**").permitAll()
+					.anyRequest().authenticated()
+			)
+			.jee(jee ->
+				jee
+					.mappableRoles("USER", "ADMIN")
+			);
 	}
 	// @formatter:on
 }