Refactoring query logic to allow multiple queries

* Split up the dbaas module since it will have many more metrics
* Subclassed the MySQL check in the DBaaS check

Co-Authored-By: Ryan Phillips <ryan.phillips@rackspace.com>
Merge pull request #521 from hub-cap/multiple_mysql_queries

Refactoring query logic to allow multiple queries
bump
Add date to HostInfo
Merge branch 'features/waldo_ohai_parity' of ssh://github.com/racker/virgo into features/waldo_ohai_parity
Add the ability to get host info types