Add `riak-cs-stanchion` script to riak-cs-ee packages
Add `riak-cs-stanchion` script to riak-cs-ee packages

Addresses: #684

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