Enable the correct instance managers for instance/floating ips.

Currently the default is nova.network.dns_driver.DNSDriver for
both. We need to switch to nova.network.minidns.MiniDNS for
both instance_dns_manager and floating_ip_dns_manager.
nova.network.dns_driver.DNSDriver is just the interface, we
need a good implementation as the default

Fixes LP #1040236

Change-Id: If6e65cb1c7802b1ba0c1e64d4c06185cabf9eeca
diff --git a/stack.sh b/stack.sh
index cddb64e..b3e858f 100755
--- a/stack.sh
+++ b/stack.sh
@@ -1478,6 +1478,8 @@
         fi
     elif is_service_enabled n-net; then
         add_nova_opt "network_manager=nova.network.manager.$NET_MAN"
+        add_nova_opt "instance_dns_manager=nova.network.minidns.MiniDNS"
+        add_nova_opt "floating_ip_dns_manager=nova.network.minidns.MiniDNS"
         add_nova_opt "public_interface=$PUBLIC_INTERFACE"
         add_nova_opt "vlan_interface=$VLAN_INTERFACE"
         add_nova_opt "flat_network_bridge=$FLAT_NETWORK_BRIDGE"