When upgrading 3scale from a version using MySQL 5.7 to another version using MySQL 8.0 and there's a `lost+found` directory into `/var/lib/mysql/data`, MySQL will fail to upgrade.

The workaround is simple, just remove this directory and if the upgrade doesn't proceed, remove the `system-mysql` deployment config to force the Operator to deploy a new one.

In MySQL 5.7 we have:

$ oc rsh dc/system-mysql cat /etc/opt/rh/rh-mysql57/my.cnf.d/10-mysql57.cnf
[mysqld]

# http://www.chriscalender.com/ignoring-the-lostfound-directory-in-your-datadir/
ignore-db-dir=lost+found

But in MySQL 8.0 we don't have any configuration with `ignore-db-dir=lost+found` directive.