Small python test cleanup
Small python test cleanup

* Use more precise exception handling
* Don't print out the port number

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