Use a real Exception, instead of double-faulting.

compute_capnet/virt/libvirt/vif.py

@@ -46,9 +46,8 @@ class CapnetLibvirtVIFDriver(nova.virt.libvirt.vif.LibvirtGenericVIFDriver): #,
         LOG.info("vif: %s" % (str(vif)))
         bridge = vif['network']['bridge']
         if not bridge:
-            LOG.error("no bridge %s for network %s" % (bridge,network_id))
-            raise exception.NetworkMissingPhysicalNetwork(
-                network_uuid=vif['network']['id'])
+            LOG.error("no bridge for network %s" % (network_id,))
+            raise Exception("no bridge for network %s" % (network_id,))
         else:
             LOG.info("using bridge %s for network %s" % (bridge,network_id))
             pass