When using Quantum, disable Nova firewalls.

http://docs.openstack.org/trunk/openstack-network/admin/content/nova_config_security_groups.html
Make sure that the dnsmasq instances libvirt creates do not jack our
stuff up.
Zap stale quantum config files
Zap more unneeded files.
Zap redundant bridge manipulation now performed in quantum::common_install
Merge pull request #140 from VictorLowther/pull-req-release-pebbles-master-3389d694213927e08a04b5f240268c74f5d0a4f9

Smooth out how nova nd quantum interact. [1/2]