Goal:

Satellite is being containerized and the installer is being rewritten. A large part of external DB integration is implemented in the new installer/foremanctl already. This needs to be tested and updated for the new containerized world.

On the development side this means extending the new installer, which needs to be tested and documented.

And, Today the mechanisms are documented in, 

https://docs.redhat.com/en/documentation/red_hat_satellite/6.18/html-single/installing_satellite_server_in_a_connected_network_environment/index#preparing-for-using-external-databases_satellite 

Acceptance Criteria:

• Users can still use same supported External DB integration mechanisms after Satellite has been containerized.
• Rewritten code is tested and verified.
• The documentation is updated

Open questions:

QE Tracker for https://issues.redhat.com/browse/SAT-40190