False Negative when comparing schemas missing optional fields

[Bento007]

When a schema is uploaded top AWS, optional fields that are missing are added to the schema with empty
values. This may cause the schemas to not match when compared even though they are functionally equivalent. This
problem has been observed when a local schema defines a facet that does not contain attribute_rules. After the
schema is published, the schema contained "attribute_rules": {}. This resulted in a false negative indicating that
the schemas did not match.