Update SchedulerTemplate to pass the arguments properly (#4005)

Author: cppwfs

spring-cloud-dataflow-rest-client/src/main/java/org/springframework/cloud/dataflow/rest/client/SchedulerTemplate.java

@@ -66,7 +66,18 @@ public void schedule(String scheduleName, String taskDefinitionName, Map<String,
 		values.add("scheduleName", scheduleName);
 		values.add("properties", DeploymentPropertiesUtils.format(taskProperties));
 		values.add("taskDefinitionName", taskDefinitionName);
-		values.add("arguments", commandLineArgs);
+		String commandLineArgValue = new String();
+		boolean isFirst = true;
+		for(String command : commandLineArgs) {
+			if(isFirst) {
+				isFirst = false;
+			}
+			else {
+				commandLineArgValue += " ";
+			}
+			commandLineArgValue += command;
+		}
+		values.add("arguments", commandLineArgValue);
 		restTemplate.postForObject(schedulesLink.getHref(), values, Long.class);
 	}
 

spring-cloud-dataflow-rest-client/src/test/java/org/springframework/cloud/dataflow/rest/client/SchedulerTemplateTests.java

@@ -68,7 +68,7 @@ public void scheduleTest() {
 		values.add("scheduleName", DEFAULT_SCHEDULE_NAME);
 		values.add("properties", DeploymentPropertiesUtils.format(props));
 		values.add("taskDefinitionName", DEFAULT_DEFINITION_NAME);
-		values.add("arguments", args);
+		values.add("arguments", args.get(0));
 		Mockito.verify(restTemplate).postForObject(SCHEDULES_RELATION, values, Long.class);
 	}