Due to the new raw_request cause error like response have no attribute 'ok'

[zhurong]

Due to the new raw_request bring in this pacth:https://github.com/openstack/python-muranoclient/commit/c60feee45cfa19522075cb0c824450eab514d23a

cause 'package import', 'package download', 'get package ui', 'get package log', 'get package supplier logo', will give the error like:

Error 'tuple' object has no attribute 'ok' occurred while installing package io.murano

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/258791

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/258791
Committed: https://git.openstack.org/cgit/openstack/python-muranoclient/commit/?id=0ea4f89fc6ef961397cfe87da38e504832c9b841
Submitter: Jenkins
Branch: master

commit 0ea4f89fc6ef961397cfe87da38e504832c9b841
Author: zhurong <email address hidden>
Date: Wed Dec 16 20:23:41 2015 +0800

    Let the SessionClient raw_request only return response

    Due to the new raw_request bring in this pacth:
    I565927db7f393c0bae41ebf9c03488f9cd966e79

    cause 'package import', 'package download', 'get package ui',
    'get package log', 'get package supplier logo', will give the error like:

    Error 'tuple' object has no attribute 'ok' occurred while installing package io.murano

    This patch fixes it by let the SessionClient raw_request
    only return response without data.

    Change-Id: If540d4fa624604b08e04faaa994f68bed31f5359
    Closes-Bug: #1527045