Fix response format 'total' for v2 dataframes API
Based on [1], the response for v2 dataframes is {"total": 3}. However,
for Elasticsearch search response [2], the "hits.total" in the response
body is {"value": 3, "relation": "eq"}, which does not match the API
response schema.
[1]: https://docs.openstack.org/cloudkitty/latest/api-reference/v2/index.html?expanded=get-dataframes-from-the-storage-backend-detail#response-example
[2]: https://www.elastic.co/guide/en/elasticsearch/reference/8.3/search-your-data.html
Story: 2010219
Task: 45967
Change-Id: Ie2c8fd1b146138efc085d7c844afd27b7e10f3f3
Co-Authored-By: Rafael Weingärtner <rafael@apache.org>
Signed-off-by: Ning Yao <yaoning@unitedstack.com>
(cherry picked from commit 3ba19ed1c7)
f647e44f42