Silenced another deprecation warning from a library.

 - Legacy-Id: 15028

Author: levkowetz

ietf/settings.py

@@ -19,6 +19,8 @@
 warnings.filterwarnings("ignore", message="escape isn't the last filter in")
 warnings.filterwarnings("ignore", message="Deprecated allow_tags attribute used on field")
 warnings.filterwarnings("ignore", message="You passed a bytestring as `filenames`. This will not work on Python 3.")
+warnings.filterwarnings("ignore", message="django.forms.extras is deprecated.", module="bootstrap3")
+
 
 try:
     import syslog