Added a warnings ignore for an issue which pops up on ietfa.

 - Legacy-Id: 12626

Author: levkowetz

ietf/settings.py

@@ -13,6 +13,7 @@
 warnings.filterwarnings("ignore", message="Report.file_reporters will no longer be available in Coverage.py 4.2", module="coverage.report")
 warnings.filterwarnings("ignore", message="initial_data fixtures are deprecated. Use data migrations instead.", module="django.core.management.commands.loaddata")
 warnings.filterwarnings("ignore", message="The popen2 module is deprecated.  Use the subprocess module.", module="ietf.utils.pipe")
+warnings.filterwarnings("ignore", message="django.contrib.contenttypes.generic is deprecated and will be removed in Django 1.9.", module="south.modelsinspector")
 
 try:
     import syslog