Ironbank Pipeline Image updates

Purpose

The ironbank pipeline image needs to be updated with a few packages that are required as part of the Ironbank Pipeline. This issue will deal with adding these packages to the Dockerfile for the ironbank pipeline image, pushing the changes, and ensuring that it passes through the pipeline successfully for the feature, development, and master branches.

Requirements to add

• jsonschema (pip install)
• TBD

Plan

1. Check out a new feature branch (something like 'add-json-schema')
2. Update the Dockerfile and hardening_manifest.yaml in the repo linked above to add the requirements listed above
3. Push the changes to run the pipeline
4. Resolve any issues that arise in the pipeline
5. Merge to development, run the pipeline again, and if there are no issues, merge to master to run again for the final time.

Acceptance criteria

The ironbank pipeline image is updated to include these new requirements and the image passes on the master branch.