Task closecontext_enabled=false for metrics ITs

 - Likely an issue in Micrometer RSocket Proxy that is related to:
   * https://stackoverflow.com/questions/69295676/spring-batch-task-is-getting-shutdown-before-rsocket-proxy-scrapes-metrics-from
   * micrometer-metrics/prometheus-rsocket-proxy#35

Author: tzolov

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

@@ -1052,7 +1052,7 @@ public void taskMetricsPrometheus() throws IOException {
 				.build()) {
 
 			// task launch id
-			long launchId = task.launch();
+			long launchId = task.launch(Arrays.asList("--spring.cloud.task.closecontext_enabled=false"));
 
 			Awaitility.await().until(() -> task.executionStatus(launchId) == TaskExecutionStatus.COMPLETE);
 			assertThat(task.executions().size()).isEqualTo(1);