Add support for additional spatial metadata types in transformation rails app

[rshewitt]

User Story

In order to process existing (h1.0) spatial harvest sources, datagov wants to add support for more spatial metadata types in the transformation rails app

Acceptance Criteria

[ACs should be clearly demoable/verifiable whenever possible. Try specifying them using BDD.]

• [ ] GIVEN the transformation app
  AND the list of currently harvested spatial metadata types WHEN a document of that type is ingested by the app
  THEN the document is transformed into DCATUS \

Background

[Any helpful contextual notes or links to artifacts/evidence, if needed]

Security Considerations (required)

[Any security concerns that might be implicated in the change. "None" is OK, just be explicit here!]

Sketch

• add schema detection functionality
• add transformation logic for ISO19115-2 & ISO19139 to ISO19115-3
• test viability of FGDC-STD-001-1998 to DCATUS

[Notes or a checklist reflecting our understanding of the selected approach]