The naming rules for MySQL/MariaDB identifiers, when quoted, allow the
`%` character.
However, currently, the use of the `%` character in database names
results in mismatch or missing databases.
- Rewrite query to identify the databases in the catalog using
`information_schema` instead of `SHOW DATABASES LIKE`
- Escape the `%` character in `CREATE DATABASE` query.
Signed-off-by: Nicolas Payart <npayart@gmail.com>
