Added test suite for set_index
Added test suite for set_index

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