CMR-9270: As CMR DevOps I want CMR services to abstractly create a DB connection

[TylerHeald1]

No description provided.

[zimzoom]

I like this approach. I do kind of wonder whether this should merge into a feature branch ala feature/db-abstraction , since:

• it is a very small piece of what will ultimately be a large refactor, which has not been fully designed yet
• it would make easier to incorporate this change with the other very large pending database code change
• it would make it easier for devs on other teams to review all the pieces in their context
• it would help keep CMR git history tidy (which some have voiced lately has been getting painful)

EDIT -- after team discussion, we elected not to pursue this path because it does not match the wider workflow of the org.