Fix for CES-401: Quantum networking not recovering from compute node reboot

Symptom: When a compute node is rebooted, quantum networking fails for all
VM instances that are hosted on it.

Resolution: This is a known issue with quantum.  An OVS cleanup utility
was added to resolve this.  The utility need to be run on the compute
node on bootup.

See:
https://github.com/openstack/neutron/commit/43ece8fb4c1bf77b662d28fa3bff42342b2a7a41
http://fedoraproject.org/wiki/Quantum
Merge pull request #128 from cdearborn/pull-req-release-mesa-1.6.1-master-b27b02f01d49b1918824cbf56f6b606e782c8fec

Fix for bug CES-401: Quantum networking not recovering from compute node reboot [1/1]