Implement ISO19115-3 reader on harvester

[jbrown-xentity]

User Story

In order to utilize the ISO19115-3 reader developments, data.gov harvester wants the changes from mdTranslator addtions applied to the datagov-harvester-transform in such a way that it is usable by the harvester2.0 system.

Acceptance Criteria

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

• [ ] GIVEN datagov-harvester-transform is deployed
  WHEN harvest2.0 needs to transform a valid ISO19115-3 into DCAT-US
  THEN the transform is able to be completed

Background

https://github.com/GSA/data.gov/issues/4639

Security Considerations (required)

None

Sketch ( deployment )

• [ ] Implement an ISO-19115 reader in the MDTranslator repo
• [ ] integrate feature into transformation rails app
• [ ] Build the new rails app and deploy it on cloud.gov
• [ ] Validate that it works by passing it an ISO-19115 source and confirming you receive DCAT-US JSON back.