add sleep to keep remote exit later

Signed-off-by: Xintao <[email protected]>

Author: hunterlxt

tests-and-examples/tests/cases/stream.rs

@@ -49,6 +49,7 @@ impl RouteGuide for RouteGuideService {
                     break;
                 }
             }
+            std::thread::sleep(std::time::Duration::from_millis(100));
             resp.success(summary).await?;
             Ok(())
         }