The environment was not set correctly, so it could not fire kafka events. It (mce-cli) always worked when running outside of docker.
I also added a dev ingestion docker image / script which may be much faster if you've already built locally.
Tested:
1. Cleaned docker volumes and started datahub. Verified it is empty.
2. Built with gradle.
3. Ran ./docker/ingestion/ingestion-dev.sh. Verified data shows in DataHub.
4. Ran step 1 again.
5. Ran ./docker/ingestion/ingestion.sh. Verified data shows in DataHub.
