500 error on delete a bay created by another user

[hongbin]

To reproduce the error:

$ source /opt/stack/devstack/openrc demo demo
$ magnum bay-create --baymodel swarmbaymodel --name swarmbay
# wait for the creation to complete
$ export OS_USERNAME=admin # switch user
$ magnum bay-delete swarmbay
Delete for bay swarmbay failed: Failed to delete trust 97109cfabbe241cc9415adfee5caf907. (HTTP 500)

There are two options to fix it:
1. Allow bay created by a user deleted by another user
2. Don't allow #1, but throw a 400 error instead (not 500)

[OpenStack Infra (hudson-openstack)]

Change abandoned by HouMing Wang (<email address hidden>) on branch: master
Review: https://review.openstack.org/289220
Reason: There is another patch(https://review.openstack.org/#/c/289656/) can fix this issue, abandon it.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/293371

[OpenStack Infra (hudson-openstack)]

Change abandoned by HouMing Wang (<email address hidden>) on branch: master
Review: https://review.openstack.org/289220
Reason: Fix by this patch: https://review.openstack.org/#/c/293371/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/293371
Committed: https://git.openstack.org/cgit/openstack/magnum/commit/?id=e79d4a182f7a741e61e3d2aa6be9349c5e456200
Submitter: Jenkins
Branch: master

commit e79d4a182f7a741e61e3d2aa6be9349c5e456200
Author: Hua Wang <email address hidden>
Date: Wed Mar 16 18:54:51 2016 +0800

    Bay can not be deleted by other users in the same project

    Trust can only be deleted by the user who creates it. So when
    other users in the same project want to delete the bay, we need
    use the trustee which can impersonate the trustor to delete the
    trust.

    Change-Id: I9f87cdf07066d316722e798cd0755f0fff5c2a02
    Closes-Bug: #1552457

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/magnum 3.0.0 release.