fix tornado log propagation

in the notebook

IPython/html/notebookapp.py

@@ -542,9 +542,8 @@ class NotebookApp(BaseIPythonApplication):
         # hook up tornado 3's loggers to our app handlers
         for name in ('access', 'application', 'general'):
             logger = logging.getLogger('tornado.%s' % name)
-            logger.propagate = False
+            logger.parent = self.log
             logger.setLevel(self.log.level)
-            logger.handlers = self.log.handlers
     
     def init_webapp(self):
         """initialize tornado webapp and httpserver"""
@@ -692,8 +691,8 @@ class NotebookApp(BaseIPythonApplication):
     
     @catch_config_error
     def initialize(self, argv=None):
-        self.init_logging()
         super(NotebookApp, self).initialize(argv)
+        self.init_logging()
         self.init_kernel_argv()
         self.init_configurables()
         self.init_components()