Explicitly enable config properties scan in java release scripts

This commit also upgrades the Spring Boot version used by the scripts
to 2.2.4 which is why the explicit annotation is required.

Closes gh-20174

ci/images/releasescripts/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.2.0.RELEASE</version>
+		<version>2.2.4.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>io.spring.concourse.releasescripts</groupId>

ci/images/releasescripts/src/main/java/io/spring/concourse/releasescripts/Application.java

 /*
-* Copyright 2012-2019 the original author or authors.
+* Copyright 2012-2020 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.
@@ -18,8 +18,10 @@ package io.spring.concourse.releasescripts;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.properties.ConfigurationPropertiesScan;
 
 @SpringBootApplication
+@ConfigurationPropertiesScan
 public class Application {
 
 	public static void main(String[] args) {