Add attribute "id" to Contact class to avoid
UnrecognizedPropertyException

If the Contact class does not contain the attribute "id", the following
exception is thrown when calling Parser.parseList(...):
com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException:
Unrecognized field "id" (class
org.bioontology.ontologies.api.models.NCBOSubmission$Contact), not
marked as ignorable (2 known properties: "email", "name"])
Resolve warnings about generic types