Added helper method wait_stop.

specialized/support/thread_host.py

@@ -26,6 +26,9 @@ class ThreadHost:
  self._thread.join()
  logging.getLogger(self._thread_name).info('The thread %s finally joined.', self._thread_name)
 
+ def wait_stop(self, timeout=None):
+ return self._thread_stop.wait(timeout=timeout)
+
  def wake(self):
  self._thread_wake.set()