Add guidance to release notes regarding the result of upgrade tests
Add guidance to release notes regarding the result of upgrade tests

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