Specify default admin credentials that can be used to bootstrap a real admin user.
Specify default admin credentials that can be used to bootstrap a real admin user.

Fixes #173

* Set default admin credentials so that the process of bootstrapping
  an admin user is less of a hassle and so that riak_cs and stanchion
  will work together with their respective default configurations.

sdebnath/stanchion,basho/stanchion