Connected interfaces are grey, not green

[Anastasia Palkina]

Interfaces should be green

[Vladimir Sharshov (vsharshov)]

More correctly way to detect offline/online: https://review.openstack.org/55969

But for VirtualBox it would not work because network adapter that we use now to support Quantum does not simulate full functions:
* do not show network speed;
* do not show online/offline state.

Fix above will show this interfaces as green but if we remove link by VirtualBox they will still be green.

[Andrey Danin (gcon-monolake)]

What about a 'LOWER_UP' flag of interface? For Ethernet devices it says that physical level is up.

[Andrey Danin (gcon-monolake)]

      "eth0": {
        "mtu": "1500",
        "encapsulation": "Ethernet",
        "number": "0",
        "type": "eth",
        "flags": [
          "BROADCAST",
          "MULTICAST",
          "UP",
          "LOWER_UP"
        ],
        "state": "up",

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/55969
Committed: http://github.com/stackforge/fuel-web/commit/0e60ff862d75d8d2ef37d2b0f8d834260f8349b6
Submitter: Jenkins
Branch: master

commit 0e60ff862d75d8d2ef37d2b0f8d834260f8349b6
Author: Vladimir Sharshov <email address hidden>
Date: Mon Nov 11 12:56:10 2013 +0400

    [PRD-1728] Add state for node network interfaces(agent, nailgun, web UI)
    Related-Bug #1247022

    Change-Id: If8358938aa67ff0d90eeaec0923b7cffe523bf33