Add verification of iproute2 capabilities used by SR-IOV agent

[Irena Berezovsky]

ML2 SR-IOV Mechanism Driver may be deployed with L2 Agent to support port update events.
In order to support neutron update-port events, iproute2 'ip link' should support VF management and link state changes of VF.
The patch following this bug report will add verification of 'ip link' supported capabilities, and if not supported will provide warning.

[Eugene Nikanorov (enikanorov)]

Irena, could you assign the bug to yourself?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/114968

[Kyle Mestery (mestery)]

Removing juno-rc-potential, as this is not a release blocking bug.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/114968
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=18b683a844e878b8b1dfbd656a22f4d5613f70c3
Submitter: Jenkins
Branch: master

commit 18b683a844e878b8b1dfbd656a22f4d5613f70c3
Author: Irena Berezovsky <email address hidden>
Date: Mon Aug 18 13:52:36 2014 +0300

    Detect if iproute2 support SR-IOV commands

    Add sanity_check that 'ip link' command supports VF management and
    link state changes of VF by parsing 'ip link help' command output.

    Co-authored-by: Samer Deeb <email address hidden>
    Closes bug: 1349302

    Change-Id: I5a72a9061a76c39960076f078905371f07069431

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/juno
Review: https://review.openstack.org/132667

[OpenStack Infra (hudson-openstack)]

Change abandoned by Samer Deeb (<email address hidden>) on branch: stable/juno
Review: https://review.openstack.org/132667
Reason: Abandoned as mark mcclain said:
there are some configurations added