Increased the delay between sibling writes so as to avoid races in resolution test.
Increased the delay between sibling writes so as to avoid races in resolution test.

Also added an option to skip the resolution test since it runs for ~5
seconds each invocation. This should fix the non-deterministic
failures in riak_test like
http://giddyup.basho.com/#/projects/riak/scorecards/35/35-387-client_python_verify-ubuntu-1004-64-eleveldb/14385/artifacts/76166

/cc @engelsanchez @javajolt

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