JSON properties use singular names even when type is array

[JDziurlaj]

Organization Name: The Turnout

Organization Type: 1 (CTR)

Document: All JSON Schemas

Comment (Include rationale for comment): The JSON schema uses the property names from the UML model as-is. This leads to creating arrays with singular names. E.g. Contest is an array containing zero or more objects.

Suggested Change: Consider whether these properties should be pluralized. We do pluralize names in other places, such as when a directed reference can point to multiple objects (Ids vs Id suffix).