Non-existing DB automatic creation

[kkujaw]

Case: When a user creates a Manager configuration and specifies a database name that does not exist, the database is created automatically.

Expected:

• User should be aware, that provided DB does not exist
• Handled by some configuration, like when DB does not exist, decide if it has to be created automatically, or skip the creation and handle correctly the user notification.

[witang9]

This is fully expected behavior of MongoDB. If a database does not exist, MongoDB creates it the first time you store data for that database, so I believe restricting this with additional configuration is unnecessary, as it will never cause an error. Nevertheless, in the linked merge request, I added a log warning to highlight when a given database does not exist.