Return complete response from tenant_networks_client

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

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 tenant_networks_client to return
complete Response body.

Change-Id: Ie0f6e709cbb3a215752344cb39f2f7a6f5a7a91b
Implements: blueprint method-return-value-and-move-service-clients-to-lib
2 files changed