delete subnet from admin tenant fails for PLUMgrid Plugin

[Fawad Khaliq]

If a non-admin tenant creates a network and a subnet and delete operation is performed by the admin tenant, PLUMgrid plugin ends up passing incorrect tenant_id to the backend and this fails the calls.

Fix would be to get correct tenant UUID in delete subnet operation.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/143315

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/143315
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=d5e9f06cf34096cd4c68c168086b6f9cc48072c3
Submitter: Jenkins
Branch: master

commit d5e9f06cf34096cd4c68c168086b6f9cc48072c3
Author: Fawad Khaliq <email address hidden>
Date: Sun Dec 21 12:57:27 2014 -0800

    PLUMgrid plugin: Fix for delete subnet with admin context

    When delete call using admin for a subnet created from a
    non-admin project is made, the tenant_id passed to backend
    happened to be of admin project. This commit fixes the issues
    by getting the correct tenant_id.

    Closes-Bug: 1404688
    Change-Id: Id21c38610ed73defb937d971a7aade57713541c0