Fix parent process watcher thread (#416)

* Fix parent process watcher thread

* timer

Author: JiahuiJiang

pyls/python_ls.py

@@ -163,9 +163,9 @@ def watch_parent_process(pid):
                     log.info("parent process %s is not alive", pid)
                     self.m_exit()
                 log.debug("parent process %s is still alive", pid)
-                threading.Timer(PARENT_PROCESS_WATCH_INTERVAL, watch_parent_process(pid)).start()
+                threading.Timer(PARENT_PROCESS_WATCH_INTERVAL, watch_parent_process, args=[pid]).start()
 
-            watching_thread = threading.Thread(target=watch_parent_process, args=[processId])
+            watching_thread = threading.Thread(target=watch_parent_process, args=(processId,))
             watching_thread.daemon = True
             watching_thread.start()