Add handler to celery task logger

Author: omarkhan

Diff for: raven/contrib/celery/__init__.py

@@ -10,7 +10,7 @@
 import logging
 
 from celery.exceptions import SoftTimeLimitExceeded
-from celery.signals import after_setup_logger, task_failure
+from celery.signals import after_setup_logger, after_setup_task_logger, task_failure
 from raven.handlers.logging import SentryHandler
 
 
@@ -64,3 +64,4 @@ def process_logger_event(sender, logger, loglevel, logfile, format,
         logger.addHandler(handler)
 
     after_setup_logger.connect(process_logger_event, weak=False)
+    after_setup_task_logger.connect(process_logger_event, weak=False)