Launch an instance from volume snapshot is no longer possible

[Gloria Gu]

Snapshots created from bootable volumes can no longer be booted, since the Launch as Instance action no longer eppears on the project -> volumes volume snapshots tab.

How to reproduce:
1. Go to project -> volumes
2. Create volume, using a source of Image, and select the cirros image (or any other bootable image)
3. After the new (bootable) volume is created, use Create Snapshot to create a snapshot.
4. In the snapshot tab, the newly created snapshot will NOT have a "Launch as Instance" action

Snapshots of bootable volumes should be launchable, and this functionality used to work.

[Gloria Gu (gloria-gu)]

rebase with master today...the unit tests error is gone, but the launch as instance action is still missing. Will update the title and description to reflect the change.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/121714

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/121714
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=fb4461a405eb5303d4c87bdfb7432aa4c949666f
Submitter: Jenkins
Branch: master

commit fb4461a405eb5303d4c87bdfb7432aa4c949666f
Author: Gloria Gu <email address hidden>
Date: Mon Sep 15 16:21:47 2014 -0700

    Fixed missing Launch as Instance for snapshot

    The snapshot created from a bootable volume doesn't have 'Launch
    as Instance' action item show up.

    Fixed the issue, now the snapshot created from a bootable volume
    should have the 'Launch as Instance' action item.

    Note: for how to create a bootable volume, please check the bug
    detail.

    Closes-Bug: #1369189

    Change-Id: I2a085c6fc07a4b08b1cb0fc61ad82a1dfa14af65