Update MDTranslator rails app success status code

[rshewitt]

User Story

In order to let mdtranslator users know whether their input was processed successfully, datagov wants to update the http status code of the response to 200 if processing was a success or 422 ( Unprocessable Entity ) if processing failed

Acceptance Criteria

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

• [ ] GIVEN the mdtranslator rails app \ WHEN an input dataset fails or succeeds processing \ THEN the response code should be 422 or 200, respectively

Background

• mdtranslator
• mdtranslator returns a 200 regardless of whether the input dataset was able to transform. we want the status code to better reflect whether the transformation was successful or not.
• 422 status code

Security Considerations (required)

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

Sketch

• update translator controller response depending on transformation success [Notes or a checklist reflecting our understanding of the selected approach]