Updated Nova and Neutron settings for Icehouse

Nova and Neutron now have stronger communication. This change
adds configuration to allow notifications between the two.
Nova will also ignore spurious Neutron failures when setting
up the virtual networking [1]. Firewall for vpn was not allowing
connections. Port was openend to allow console access.

[1] http://openstack.redhat.com/Workarounds#nova:_instances_started_in_error_state
Merge pull request #38 from hogepodge/icehouse_migration

Updated Nova and Neutron settings for Icehouse