cleaning pids after stopping the processes in openvpn.py

openvpn.py

@@ -159,10 +159,10 @@ class Openvpn:
                     os.kill(pid, signal.SIGINT)
                 except Exception as err:
                     print("kill failed:", err)
-
             self.status = IDLE
             for task in self.run_task:
                 task.cancel()
+            self.pids = []
             self.run_task = []
             try:
                 os.remove(self.log_fp)