Credential list API returns list of available credentials when user passes invalid name as query parameter

In credential list API, when user passes the query parameter as name with invalid value then, it returns list of all available credentials.

Steps to reproduce:

1. Curl Command
curl -g -i -X GET http://10.232.48.206/identity/v3/credentials?name=2dba5076c6f14c2ea6bf691e7d0ba71534333333 -H "User-Agent: python-keystoneclient" -H "Accept: application/json" -H "X-Auth-Token: fddae55403c247a1bb1ddc6751424c63"

2. Response
HTTP/1.1 200 OK
Date: Thu, 25 May 2017 11:40:57 GMT
Server: Apache/2.4.18 (Ubuntu)
Vary: X-Auth-Token
Content-Type: application/json
Content-Length: 410
x-openstack-request-id: req-4cfb95d7-6424-4151-819b-37d195e20b43
Connection: close

3. Output
{"credentials": [{"user_id": "8c3b0c35d48142b3a1b5078bb7abd203", "links": {"self": "http://10.232.48.206/identity/v3/credentials/52c7d4b344174e92b83a35e5cf873262"}, "blob": "test_data", "project_id": null, "type": "cert", "id": "52c7d4b344174e92b83a35e5cf873262"}], "links": {"self": "http://10.232.48.206/identity/v3/credentials?name=2dba5076c6f14c2ea6bf691e7d0ba71534333333", "previous": null, "next": null}}

In my opinion to maintain the consistency, Credential list API should return empty list when invalid query parameter is passed. Same issue is present for the policy API also.

master:
commit e171c7905556d372a236b227d4ef599ea3034920
Author: OpenStack Proposal Bot <email address hidden>
Date: Sat May 20 04:36:44 2017 +0000