Use Spring Security lambda DSL in samples

Fixes: gh-1580

spring-session-samples/spring-session-sample-boot-redis-json/src/main/java/sample/config/SecurityConfig.java

@@ -34,13 +34,14 @@ public class SecurityConfig extends WebSecurityConfigurerAdapter {
 	@Override
 	protected void configure(HttpSecurity http) throws Exception {
 		http
-			.authorizeRequests()
+			.authorizeRequests((authorize) -> authorize
 				.requestMatchers(PathRequest.toStaticResources().atCommonLocations()).permitAll()
 				.anyRequest().authenticated()
-				.and()
-			.formLogin()
+			)
+			.formLogin((formLogin) -> formLogin
 				.loginPage("/login")
-				.permitAll();
+				.permitAll()
+			);
 	}
 	// @formatter:on