Implement Lessons Learned From JDL

[reid-spencer]

Features Gleaned from #115 should be implemented:

• Entities can have relationships with other entities in the usual ERD manner (1-to-1, 1-to-many,...). This could be done
  with a "relates to" clause on the entity and a pathId and relationship type to the other entity. (see Implement Processor Relationships #527)
• Allow "microservice" as a kind option choice for various definitions
• Add ZonedDateTime, optionally with the Zone Mneumonic as a predefined type
• Add Blob as a predefined type, possibly with a string parameter, like Blob("Image")
• Add an OpenAPI pass to generate OpenAPI input from the specifications in RIDDL (see Create OpenAPI pass to generate OpenAPI input from the specifications in RIDDL #526)