Standardize 404 error response for domains?name search

[TheRedTrainer]

Some 404 error responses for domains?name don't serve the same content. For example, the following query

http://localhost:8080/rdap-server/domains?name=*-*

provides this response:

{
 "rdapConformance": [
   "rdap_level_0"
 ],
 "errorCode": "404",
 "title": "Object not found"
}

And this query

http://localhost:8080/rdap-server/domains?name=,.

provides this response:

{
 "rdapConformance": [
   "rdap_level_0"
 ],
 "errorCode": "404",
 "title": "Object not found",
 "description": [
   "Object not found."
 ]
}

The first response includes only errorCode and title, the second response includes errorCode, title and description.