Enable http response extraction

This patch is a preparation for adding RBAC tests.
Currently, we only return the body without the response
in manila REST client. The response is necessary for
the testing, because we need to check the returned code
status and to compare it with the expected status.
This way we will check if the user has the right
permissions for the action.

Change-Id: If0e39afb635c469a25919770a869087bf5def561
82 files changed