Create volume from volume snapshot does not work if volume type is specified

[Amogh]

Login to DevStack as Admin :
1. Create the volume type
2. Create the volume "test" ( No Volume Type)
3. Create the volume snapshot "test" from volume "test" (No Volume Type)
4. Go to snapshots and Create the volume from volume snapshot "test", this time select the volume type
5. Observe that unable to Create volume is displayed.

Screenshot attached for reference.
Bug also occurs when creating a volume from a existing volume.

[Gary W. Smith (gary-w-smith)]

When creating a volume from a snapshot, cinder requires the derived volume's type to match the snapshot's if it is supplied; if it is omitted, then it works properly. The volume type selection should be hidden when creating a volume from a snapshot.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/119384

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/119384
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=3fb3b5549f4d4c10e01f82ec1fc0f0abc0490d2e
Submitter: Jenkins
Branch: master

commit 3fb3b5549f4d4c10e01f82ec1fc0f0abc0490d2e
Author: Sam Betts <email address hidden>
Date: Fri Sep 5 13:54:47 2014 +0100

    Only show type field on specific volume sources

    Omit volume type field in scenarios where the type is derived from the
    volume source.

    Change-Id: Ie4dad2f279b5c514153932f833fc0af082b9f86f
    Closes-Bug: 1365596