Fix one forgotten reference to `elements` rather than `resources`
Fix one forgotten reference to `elements` rather than `resources`

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