Fix test for Session::force_terminate

Wait for ssh multiplex master to cleanup and exit.

Signed-off-by: Jiahao XU <[email protected]>

Author: NobodyXu

tests/openssh.rs

@@ -867,6 +867,9 @@ async fn test_detach_and_resume_process_mux() {
 
         session2.force_terminate().await.unwrap();
 
+        // Wait for ssh multiplex master to clean up and exit.
+        sleep(Duration::from_secs(3)).await;
+
         assert!(!ctl.exists());
     }
 }
@@ -909,6 +912,9 @@ async fn test_detach_and_resume_native_mux() {
 
         session2.force_terminate().await.unwrap();
 
+        // Wait for ssh multiplex master to clean up and exit.
+        sleep(Duration::from_secs(3)).await;
+
         assert!(!ctl.exists());
     }
 }