Batch Boot Runner only supports one job.

Needed to update TaskJobLauncher to support only one job.
Updated tests accordingly
Re-added Added tests removed from M3 release

spring-cloud-task-samples/batch-job/src/test/java/io/spring/BatchJobApplicationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2019 the original author or authors.
+ * Copyright 2015-2022 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.
@@ -58,10 +58,6 @@ public class BatchJobApplicationTests {
 
 		assertThat(i).isGreaterThan(0);
 
-		int j = output.indexOf(JOB_ASSOCIATION_MESSAGE, i + 1);
-
-		assertThat(j).isGreaterThan(i);
-
 
 		String taskTitle = "Demo Batch Job Task";
 		Pattern pattern = Pattern.compile(taskTitle);