Changes to Create Counterparty

added the new optional request property legal_entity/legal_entity_associations/items/child_legal_entity/primary_social_media_sites

added the new optional request property legal_entity/primary_social_media_sites

the request property legal_entity/addresses/items/postal_code became optional

the request property legal_entity/addresses/items/region became optional

the request property legal_entity/legal_entity_associations/items/child_legal_entity/addresses/items/postal_code became optional

the request property legal_entity/legal_entity_associations/items/child_legal_entity/addresses/items/region became optional