TimerService: make TimerResponse support redirect()

This allows executing a script doing REQUEST.RESPONSE.redirect() without
error.

Before this patch it's an AttributeError similar to:

    ------
    2022-04-12 03:52:49,083 WARNING ActivityTool Could not call method ...
    Traceback (most recent call last):
      ...
      File "Script (Python)", line 34, in Base_redirect
        return request.RESPONSE.redirect(redirect_url, status=status_code)
    AttributeError: TimerResponse instance has no attribute 'redirect'

product/TimerService/timerserver/TimerServer.py

@@ -125,6 +125,9 @@ class TimerResponse(BaseResponse):
     def _finish(self):
         pass
 
+    def redirect(self, *args, **kw):
+        pass
+
     def unauthorized(self):
         pass