remove print statement
allow_mult=false by default for 2.0.0pre20+

See also:
* http://lists.basho.com/pipermail/riak-users_lists.basho.com/2014-April/015002.html
* https://github.com/basho/riak/issues/511
* https://github.com/basho/riak_kv/pull/825
* http://docs.basho.com/riak/2.0.0pre20/dev/advanced/bucket-types/
set bucket allow_mult=true to make test pass
version 0.1.4