Attribute and logic improvements

This pull requests includes some additional local attributes to help assist with the deployment of our openstack infrastructure. It also changes the testing environment to mimic closer to production with prefixed/suffixed data bags and database names/users. This also fixes osuosl-cookbooks/osl-openstack/issues/14.
I'm confused here. You set this to, for one example, `ceilometer_x86`, but the data bag you made is `x86_db_passwords/ceilometer.json`. Is this for some other data bag?