Normalize all static networks with bridges

Modifies the storage and upstream networks to mirror the cluster
network, with a bridge on top of the underlying specified dev, and all
IPs bound to the bridge.

Allows creating VMs in the storage or upstream networks, as well as the
cluster network, should the administrator choose to do so (manually).

node-daemon/pvcd/DNSAggregatorInstance.py

@@ -77,9 +77,7 @@ class PowerDNSInstance(object):
         self.dns_server_daemon = None
 
         # Floating upstreams
-        self.vni_dev = self.config['vni_dev']
         self.vni_ipaddr, self.vni_cidrnetmask = self.config['vni_floating_ip'].split('/')
-        self.upstream_dev = self.config['upstream_dev']
         self.upstream_ipaddr, self.upstream_cidrnetmask = self.config['upstream_floating_ip'].split('/')
 
     def start(self):