address PR review

Author: vuduchailinh

serializer-deserializer/src/main/java/com/amazonaws/services/schemaregistry/utils/apicurio/FileDescriptorUtils.java

@@ -43,6 +43,7 @@
 import static com.google.common.base.CaseFormat.LOWER_UNDERSCORE;
 import static com.google.common.base.CaseFormat.UPPER_CAMEL;
 import static com.google.protobuf.DescriptorProtos.*;
+import static com.squareup.wire.schema.Options.ONEOF_OPTIONS;
 
 /**
  * @author Fabian Martinez, Ravindranath Kakarla, Carles Arnal
@@ -584,7 +585,7 @@ private static String determineFieldType(ProtoType protoType, Schema schema) {
      * This method generates the synthetic one-of from a Proto3 optional field.
      */
     private static OneOf getProto3OptionalField(Field field) {
-        return new OneOf("_" + field.getName(), "", Collections.singletonList(field), field.getLocation(), field.getOptions());
+        return new OneOf("_" + field.getName(), "", Collections.singletonList(field), DEFAULT_LOCATION, new Options(ONEOF_OPTIONS, Collections.emptyList()));
     }
 
     private static EnumDescriptorProto enumElementToProto(EnumType enumElem) {