Provisioning improvements: MySQL DB names and logging

We changed the naming conventions for MySQL provisioning. Instead of tapi_3800_sand and tapi_3800_tran, where 3800 is my token ID, the new database names are sand_232_3800 and tran_3800, where 232 is project ID for easier distinction between projects in your sandbox userspace. Existing credentials keep their database names.

We also added a little more information to events: