Update python test README configuration
Update python test README configuration

`enforce_multipart_part_size` must be `false`

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