Integrations tests for single-component management scripts

Unlike #48 (closed), this issue tracks integration tests for the management scripts pertaining to single components of the ingestion pipeline. This issue has a sub-issue for each component. What we are looking for are tests for each component that tell us whether each of the following works as intended:

• starting a service / component,
• waiting for it (if applicable),
• apply configuration (if applicable),
• using it,
• stopping it.

Each test should ideally be run in a reproducible, dockerized environment so that we can run it during CI.