Comment 1 for bug 1573207

Reviewed: https://review.openstack.org/309622
Committed: https://git.openstack.org/cgit/openstack/networking-arista/commit/?id=5252768cbe3d76aef2e6124424ec741077ffeb57
Submitter: Jenkins
Branch: master

commit 5252768cbe3d76aef2e6124424ec741077ffeb57
Author: Sukhdev Kapur <email address hidden>
Date: Fri Apr 22 16:26:31 2016 -0700

    Do not delete a network with ports attached to it

    If a network has ports attached to it, do not delete the network
    instead raise an exception so that user knows about this
    condition.

    Additionally, during initialization, when networks are deleted,
    remove all the ports associated with the network.

    Change-Id: Idb72305ac37dfe0c865fe09fbc5ab784d807906d
    Closes-bug: #1573207