WS-2744: add no-op genre back in

Author: Katsuya-Tomioka

json/src/main/java/com/basistech/rosette/apimodel/jackson/DocumentRequestMixin.java

@@ -20,6 +20,7 @@
 import com.basistech.util.LanguageCode;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonTypeName;
@@ -30,6 +31,7 @@
 
 //CHECKSTYLE:OFF
 @JsonTypeName("DocumentRequest")
+@JsonIgnoreProperties({"genre"})
 @JsonInclude(JsonInclude.Include.NON_NULL)
 public abstract class DocumentRequestMixin {