Return complete response from hypervisor_client

Currently compute hypervisor_client returns Response by removing
top key from Response.
For example-
return service_client.ResponseBody(resp, body['hypervisor'])

As service clients are in direction to move to Tempest-lib, all
service clients should return Response without any truncation.
One good example is Resource pagination links which are lost with current
way of return value. Resource pagination links are present in parallel
(not inside) to top key of Response.

This patch makes compute hypervisor_client to return complete
Response body.

Change-Id: Icf782e4469fcecba773b3187c1b36d9d49829c93
Implements: blueprint method-return-value-and-move-service-clients-to-lib
3 files changed