can't cleanup router interface in network:router_interface_distributed case

[Leontii Istomin]

If we use neutron with DVR feature, rally can't delete port during cleanup step: http://paste.openstack.org/show/406611/
So, we need to add condition like
if self.raw_resource["device_owner"] == "network:router_interface_distributed"
into rally/benchmark/context/cleanup/resources.py

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/209480

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/209483

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/209480
Committed: https://git.openstack.org/cgit/openstack/rally/commit/?id=0349fd5fdba6df67964a55bf013520c81f0d44bd
Submitter: Jenkins
Branch: master

commit 0349fd5fdba6df67964a55bf013520c81f0d44bd
Author: Andrey Kurilin <email address hidden>
Date: Wed Aug 5 14:57:53 2015 +0300

    Extend neutron port cleanup

    Adds support of "router_interface_distributed" device owner.

    Closes-Bug: #1480391
    Change-Id: I435ad4cb3fb19682fb8e330d92495fe54099191e

[OpenStack Infra (hudson-openstack)]

Change abandoned by Andrey Kurilin (<email address hidden>) on branch: master
Review: https://review.openstack.org/209483