Patch for OVN metadata proxy in RDO

networking-ovn-metadata-proxy.diff

# diff -u a/networking_ovn/agent/metadata/agent.py b/networking_ovn/agent/metadata/agent.py
--- a/networking_ovn/agent/metadata/agent.py     2017-07-14 19:58:10.000000000 +0900
+++ b/networking_ovn/agent/metadata/agent.py    2017-08-06 18:41:39.129119566 +0900
@@ -248,8 +248,7 @@
         # addresses, then tear the namespace down if needed. This might happen
         # when there are no subnets yet created so metadata port doesn't have
         # an IP address.
-        if not (port and port.mac and
-                port.external_ids.get(ovn_const.OVN_CIDRS_EXT_ID_KEY, None)):
+        if not (port and port.mac):
             LOG.debug("There is no metadata port for datapath %s or it has no "
                       "MAC or IP addresses configured, tearing the namespace "
                       "down if needed", datapath)
@@ -268,8 +267,7 @@
             return

         mac = match.group()
-        ip_addresses = set(
-            port.external_ids[ovn_const.OVN_CIDRS_EXT_ID_KEY].split(' '))
+        ip_addresses = set(port.mac[0].split(' ')[1:])
         ip_addresses.add(METADATA_DEFAULT_CIDR)
         metadata_port = MetadataPortInfo(mac, ip_addresses)