add support for v2 image create/update commands

[wanghong]

Implement v2 image create and image update command in openstackclient.

(stevemar) as of 1.3.0 we now have image update/set support

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/182504
Committed: https://git.openstack.org/cgit/openstack/python-openstackclient/commit/?id=ce05822a3a328bffa8ec62ec72da946c0d187c2c
Submitter: Jenkins
Branch: master

commit ce05822a3a328bffa8ec62ec72da946c0d187c2c
Author: Amey Bhide <email address hidden>
Date: Tue May 12 17:01:07 2015 -0700

    Add support for v2 image set command

    Partial-Bug: #1405562
    Change-Id: Ie30802d720a247748c45099c38450cc6c76bbc2a

[Niall Bunting (niall-bunting)]

https://review.openstack.org/#/c/203280/ Image create

[OpenStack Infra (hudson-openstack)]

Change abandoned by Sean Perry (<email address hidden>) on branch: master
Review: https://review.openstack.org/203280
Reason: Taken over by Monty in https://review.openstack.org/#/c/225443/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/225443
Committed: https://git.openstack.org/cgit/openstack/python-openstackclient/commit/?id=f5b50df8ea6de7e763f1c2e7079429d9c783f963
Submitter: Jenkins
Branch: master

commit f5b50df8ea6de7e763f1c2e7079429d9c783f963
Author: Monty Taylor <email address hidden>
Date: Sat Sep 19 13:04:13 2015 -0400

    Add image create support for image v2

    We have it for v1, but v2 is the future. There are two differences,
    things in v2 do not go into a properties dict, and the actual image
    data needs to get uploaded as a second step.

    Closes-Bug: 1405562
    Co-Authored-By: Niall Bunting <email address hidden>
    Co-Authored-By: Sean Perry <email address hidden>
    Change-Id: If7b81c4a6746c8a1eb0302c96e045fb0f457d67b