Hide Availability Zone for create Volume from snapshot

[Lin Hua Cheng]

Steps :
=======
1. Create a Volume in a az2
2. Create a snapshot of the above volume (snapshot will be in az2)
3. Try to create the volume from the above snapshot and select the different availability zone ( other than az2)

Error is returned from Cinder that the Volume and Snapshot must be in the same AZ.

The only valid values are the "Any AZ" or AZ of the Snapshot, we should just hide the Availability Zone field to the user to avoid confusion. The volume will be automatically created in the same AZ as the snapshot.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/60045

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/60045
Committed: http://github.com/openstack/horizon/commit/210d58de0e28d562ab6b315ed33aec9cdf75e515
Submitter: Jenkins
Branch: master

commit 210d58de0e28d562ab6b315ed33aec9cdf75e515
Author: Lin Hua Cheng <email address hidden>
Date: Wed Dec 4 10:44:59 2013 -0800

    Hide AZ when creating Volume from snapshot

    Volume created from snapshot must match the AZ of the snapshot.
    It doesn't make sense to allow the user to select the AZ as the
    only valid values are Any AZ or AZ of the snapshot - which the user
    still need to figure out.

    Change-Id: Id3fb03fc2bc152ae0af72b939f63d9d403324fe6
    Closes-Bug: #1257845