Merge pull request #2859 from deniszh/rollb

Rollback whitenoise upgrade

Author: deniszh

requirements.txt

@@ -46,6 +46,6 @@ cairocffi
 git+https://github.com/graphite-project/whisper.git#egg=whisper
 # Ceres is optional
 # git+https://github.com/graphite-project/ceres.git#egg=ceres
-whitenoise==6.7.0
+whitenoise==4.1.4
 urllib3
 six