Add convenience print after cinder backup-create

[Seif Lotfy]

Currently I am doing lots of testing with cinder-backup. While using the command line I find it a bit frustrating that I have to do a "cinder backup-list" after each "cinder-backup create <volume-id>" and look for a the <backup-id> matching that <volume-id>.
Things get worse when I have several backups of that one <volume-uid>.

My proposal would to do a print (like the ones found after e.g: "cinder create 1") that would allow quicker referencing.
It should look as follows IMHO:
+-----------+--------------------------------------+
| Property | Value |
+-----------+--------------------------------------+
| id | c82ab157-5703-4bb3-af8a-b2ad62a37c0f |
| name | goof |
| volume_id | 93fc368b-e936-4136-91f7-fb92fb93aabe |
+-----------+--------------------------------------+

This would make everything much more convenient.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/41271

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/41271
Committed: http://github.com/openstack/python-cinderclient/commit/219798536d47ce23c73a30894b3d3eb69574f7ad
Submitter: Jenkins
Branch: master

commit 219798536d47ce23c73a30894b3d3eb69574f7ad
Author: Seif Lotfy <email address hidden>
Date: Sat Aug 10 22:00:01 2013 +0000

    Add print for "backup-create" command

    For convenience reasons backup-create should print out metadata

    Fixes bug: 1210874

    Change-Id: I327aaadb3b82c2073cec5807aa429c4ffac6ee0f