Update to correct categories on storage/access statistics
Update to correct categories on storage/access statistics

yangchengjian/riak_cs,basho/riak_cs,dragonfax/riak_cs,GabrielNicolasAvellaneda/riak_cs,GabrielNicolasAvellaneda/riak_cs,dragonfax/riak_cs,laurenrother/riak_cs,yangchengjian/riak_cs,sdebnath/riak_cs,sdebnath/riak_cs,laurenrother/riak_cs,sdebnath/riak_cs,yangchengjian/riak_cs,yangchengjian/riak_cs,sdebnath/riak_cs,GabrielNicolasAvellaneda/riak_cs,dragonfax/riak_cs,laurenrother/riak_cs,basho/riak_cs,laurenrother/riak_cs,basho/riak_cs,dragonfax/riak_cs,basho/riak_cs,GabrielNicolasAvellaneda/riak_cs