Disable Heroku test runner

Reason:
* Django Unit Tests Failing on Travis CI Builds
* https://stackoverflow.com/questions/50805897/django-unit-tests-failing-on-travis-ci-builds

app/app/settings.py

@@ -163,4 +163,4 @@ SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
 # on the import phase
 IMPORT_BATCH_SIZE = 500
 
-django_heroku.settings(locals())
+django_heroku.settings(locals(), test_runner=False)