Quantum-interfaced Scheduler to support 802.1qbh

In a cluster comprising of 802.1Qbh-based systems, the decision of where to place the VM depends on the availability of a "dynamic" nic on a patricular system (to which the VIF plugs into). This availability information can be obtained from Quantum network service (supporting the 802.1Qbh extensions). The scheduler interfaces with Quantum using a Quantum client library, and obtains the hostname information. The VM is then scheduled on this host.