Replace deprecated test methods with recommended alternatives

[MarkEWaite]

Replace deprecated test methods with recommended alternatives

The PresetData methods are replaced with a mock security realm that provides exactly the permissions desired.

Also adds one Override annotation that was missing.

Testing done

Confirmed that automated tests pass. Will check that coverage did not decrease on ci.jenkins.io.

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue