Currently, Geo manually manages additional DB connections.
This results in a number of overwrites to provide this
kind of support.

These changes are the first step towards configuring the
Geo tracking database in database.yml with the following:

1. Use Rails 6 many databases support to reduce the
 complexity of the current implementation;
2. Keep Geo tracking database files (structure.sql,
 migrations, etc) in EE;

Changelog: changed
EE: true