Fix DataFlowIT timestamp-task coordinates (spring-attic#4899)

Author: onobc

spring-cloud-dataflow-server/src/test/java/org/springframework/cloud/dataflow/integration/test/DataFlowIT.java

@@ -2002,8 +2002,8 @@ private void registerTimestamp(String versionNumber) {
 		if (taskResource.getUri().startsWith("maven:")) {
 			try {
 				appRegistryOperations.register("timestamp", ApplicationType.task,
-						"maven://org.springframework.cloud.task.app:timestamp-task:" + versionNumber,
-						"maven://org.springframework.cloud.task.app:timestamp-task:" + versionNumber, false);
+						"maven://spring.io:timestamp-task:" + versionNumber,
+						"maven://spring.io:timestamp-task:" + versionNumber, false);
 			}
 			catch (DataFlowClientException dfe) {
 				logger.info(dfe.getMessage(), dfe);