Cleanup bucket properties shortcuts with a helper function.
Cleanup bucket properties shortcuts with a helper function.

basho/riak-python-client,GabrielNicolasAvellaneda/riak-python-client,GabrielNicolasAvellaneda/riak-python-client,bmess/riak-python-client,bmess/riak-python-client,basho/riak-python-client,basho/riak-python-client