Use http security nested builder in samples

Issue: gh-5557

samples/javaconfig/form/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.
@@ -29,16 +29,20 @@ public class SecurityConfig extends WebSecurityConfigurerAdapter {
 	@Override
 	protected void configure(HttpSecurity http) throws Exception {
 		http
-			.authorizeRequests()
-				.antMatchers("/resources/**").permitAll()
-				.anyRequest().authenticated()
-				.and()
-			.formLogin()
-				.loginPage("/login")
-				.permitAll()
-				.and()
-			.logout()
-				.permitAll();
+			.authorizeRequests(authorizeRequests ->
+				authorizeRequests
+					.antMatchers("/resources/**").permitAll()
+					.anyRequest().authenticated()
+			)
+			.formLogin(formLogin ->
+				formLogin
+					.loginPage("/login")
+					.permitAll()
+			)
+			.logout(logout ->
+				logout
+					.permitAll()
+			);
 	}
 	// @formatter:on