use vif_details to get physical_network for mellanox vif driver to support ML2 plugin

[Irena Berezovsky]

Mellanox networking solution requires knowledge of physical network during VIF plugging.
vif _details dictionary on bort:binding is filled with physical_network by neutron plugin (ML2 MechanismDriver). VIF Driver should use vif_details to get physical_network info.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/90643
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=54219198106ce281d252bf48f994cac082e5b3d0
Submitter: Jenkins
Branch: master

commit 54219198106ce281d252bf48f994cac082e5b3d0
Author: Irena Berezovsky <email address hidden>
Date: Sun Apr 27 08:47:29 2014 +0300

    Add physical_network to binding:vif_details dictionary

    During port binding binding:vif_details dictionary is
    updated with physical_network to be used by mlnx nova vif driver.
    binding:profile update will be removed once nova side fix is merged
    to keep consistent solution.

    Change-Id: If9525929a1546e8d05f7923570d30dfc2eed8898
    Closes-Bug: 1304872

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/90666
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=586c6686aaa9e1d0de6d920371f1f489da0a2a9e
Submitter: Jenkins
Branch: master

commit 586c6686aaa9e1d0de6d920371f1f489da0a2a9e
Author: Irena Berezovsky <email address hidden>
Date: Mon Apr 28 09:11:51 2014 +0300

    Use VIF details dictionary to get physical_network

    Modify mlnx_direct plug and unplug to retrieve physical_network
    from VIF details dictionary if network meta dictionary does not contain
    physical_network. This will serve ML2 case following the guidelines to
    populate vif_details dictionary with attributes required for port plugging.

    Change-Id: I0d97bc875be2fff18087c78accef3ec81c059c4b
    Closes-Bug: 1304872