[test][setup] Move test_XXX database configuration to setup SQL

If the configuration is placed in setup SQL set instead of README, we
don't care about.
I think so but the README doesn't have a section for it. The README is a troubleshooting documentation. It is not for "how to setup development environment" content.

I think that we may need to reconstruct the README contents or reconsider where we put documentations. For example, using Wiki is an option.

Do you have any plan?

Anyway, it seems that the topic is a separated work with this change.