Revert "Adding site.json.example data_bag."

This reverts commit fc58714f5e71424b60ffccd74e50cff34d56ba0f.
Removing the vagrant environment, and instead defining the attributes in Vagrantfile.

Making data_bags_path optional, only providing it to Chef Solo if the data_bags directory exists.

Adding chef.log_level if ENV['CHEF_DEBUG'].
Adding README.md, and updating Vagrantfile to match.
Allowing remote root connection in mysqld