Remove any leftover objects from a failed test_store_of_missing_object.
Remove any leftover objects from a failed test_store_of_missing_object.

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