[Issue #337] Fix Http Test Subscriber startup issue by moving the Thr…

…ead.sleep into the child thread (#338)

* [Issue #337] Fix HttpSubscriber startup issue

* [Issue #337] test commit

* [Issue #337] revert test commit

Co-authored-by: j00441484 <jin.rong.luo@huawei.com>

eventmesh-test/src/main/java/org/apache/eventmesh/http/demo/sub/service/SubService.java

@@ -75,12 +75,15 @@ public void afterPropertiesSet() throws Exception {
         }));
 
         Thread stopThread = new Thread(() -> {
+            try {
+                Thread.sleep(5 * 60 * 1000);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
             logger.info("stopThread start....");
             System.exit(0);
         });
 
-        Thread.sleep(5 * 60 * 1000);
-
-//        stopThread.start();
+       stopThread.start();
     }
 }