Fix HTTP URLs for 2.0.
Fix HTTP URLs for 2.0.

There are still failing tests related to allow_mult and YZ schemas.

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