Use default Graphite storage aggregation config

This is required for the GA API usage metrics so that they can use a
sum aggregation rather than the default average.
# xFilesFactor?!
![](http://24.media.tumblr.com/94ff4d6ec1c3d30bae38facf785181d2/tumblr_mtfl619OfQ1rc1wdpo1_400.gif)
# 0.1 mate
![](http://media.tumblr.com/tumblr_lf2wmfcXQA1qc8d3j.gif)