Demonstrate space use case

[brianlee731]

Demonstrate scalable execution of a chained workflow composed by EDRgen + RDRgen PGEs, triggered by initiators. Execute this in a JPL AWS account. Complement with nightly tests. Note that Andy has explicietly asked for Unity to be used by SRL and said he will be monitoring progress. This could be implemented with or without CWL (or maybe both).

[LucaCinquini]

Gerald gave a great demo to the Unity tea, this ticket can be closed. Development can continue with further enhancements.