Allow for an init script that runs as the database admin (superuser) for JdbcTestContainer implementations

This would allow customized setup that just isn't possible as the "test" user.

TC_INITSCRIPT_SUPER parameter maybe?

This would ideally run before the

TC_INITSCRIPT

so there is an opportunity to configure things before the main real-user based init script runs.

Example Usages...

1. Setting up multischema databases (that utilize joins across schemas)
2. Some stored procedure creation DDLs need admin/root access on the DB
3. Custom database/schema naming
4. Grants

As a side-note it would be nice to have a code-based way to get a connection as the admin/root user for code based configuration that requires it.

Inizia individuando le implementazioni di JdbcTestContainer e la gestione esistente di TC_INITSCRIPT. Traccia come vengono configurati gli script di inizializzazione e le connessioni degli utenti del database, quindi verifica che una configurazione del superuser venga eseguita prima dello script principale dell’utente di test e supporti i casi d’uso elencati relativi a schema, DDL, denominazione e grant.