In 3.3.0, we are planning on making backwards incompatible changes to the etl configuration.
We should provide an upgrade path for anybody who has 3.2.x pipelines. The upgrade tool for Hydrator will be separate from CDAP upgrade.
The upgrade tool should be able to:
1. convert an old config into the new config
2. given cdap host, port, and credentials, upgrade 3.2.x pipelines to 3.3.0 pipelines.