support multiple, chained, ordered transformations for Transform job

[ghukill]

Explore multiple, ordered transformations for a Transform job.

[ghukill]

This would encourage seperation of concerns when creating transformations -- XSLT, python, etc. -- without paying a penalty of exploding Record and Job counts, by allowing multiple, ordered transformations to be applied to the same Job.

Envisioning sortable, drag and drop lists along the lines of: https://lukasoppermann.github.io/html5sortable/index.html

Todo:

• update documentation when complete
• capture ordered ids of transformation scenarios (using serialization)
• rework spark.jobs to handle multiple, chained transformations
• change what is written to job_details
• update "Transform" tab for Record details page
  • no longer a single Transformation, consider just restricting sort and expanding table?
• exports support multiple transformation Jobs
• update Transformation testing

[ghukill]

Becoming clear this might be worthy of bumping version to v0.4 to include. The altered job_details results in non-backwards compatible Jobs.

This makes it related to: https://github.com/WSULib/combine/issues/357

[ghukill]

Complete. Any further issues will be seperate issues.