VMware: nova ignores cinder volume mappings

[Gary Kotton]

When booting from a volume the Nova driver ignores the cinder 'storage_policy' and moves the volume to the datastore that nova selected. Nova should use the cinder datastore

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/218639

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/220085

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/220085
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=aadc18d883281d9f5e6b23a619056d83f8bdfc4c
Submitter: Jenkins
Branch: master

commit aadc18d883281d9f5e6b23a619056d83f8bdfc4c
Author: Gary Kotton <email address hidden>
Date: Thu Sep 3 03:50:30 2015 -0700

    VMware: add method for getting hosts attached to datastore

    Add in a method that returns hosts attached to a datastore. This will
    enable us to validate if the cinder volume is accessible by a running
    instance.

    Change-Id: I840ffda4926cea879d5945886ba87da72fc90805
    Partial-bug: #1490257

[OpenStack Infra (hudson-openstack)]

Change abandoned by Matt Riedemann (<email address hidden>) on branch: master
Review: https://review.opendev.org/218639
Reason: This is super old and in merge conflict so I'm going to abandon. Can be restored and rebased if someone wants to continue working on this.