Use spring-javaformat to format and check code

Resolves: #1450

spring-session-samples/spring-session-sample-javaconfig-security/src/main/java/sample/Config.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2017 the original author or authors.
+ * Copyright 2014-2019 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.
@@ -32,5 +32,6 @@ public class Config {
 	public LettuceConnectionFactory connectionFactory() {
 		return new LettuceConnectionFactory(); // <2>
 	}
+
 }
 // end::class[]