Further fixes to the Kubernetes config provider, and a new set of proper unit tests

endpoints/api/suconfig.py

@@ -291,7 +291,7 @@ class SuperUserConfigFile(ApiResource):
       if not uploaded_file:
         abort(400)
 
-      config_provider.save_volume_file(filename, uploaded_file)
+      config_provider.save_volume_file(uploaded_file, filename)
       return {
         'status': True
       }