chore(requirements): Django REST Framework 3.4.3

http://www.django-rest-framework.org/topics/release-notes/#342

http://www.django-rest-framework.org/topics/release-notes/#343

Author: helgi

rootfs/requirements.txt

@@ -3,7 +3,7 @@ backoff==1.2.1
 Django==1.9.8
 django-cors-middleware==1.2.0
 django-guardian==1.4.4
-djangorestframework==3.4.1
+djangorestframework==3.4.3
 docker-py==1.9.0
 gunicorn==19.6.0
 jmespath==0.9.0