Un-quote metadata address if it is IPv6

In lib/neutron-legacy, the Nova metadata host address is
un-quoted if it is IPv6, i.e. 2001:db8::1, not [2001:db8::1].
We should be doing the same in lib/neutron.

Change-Id: I80c96603a41ef9d289712ef15b464859aa9257be

Author: Brian Haley

lib/neutron

@@ -54,6 +54,7 @@ NEUTRON_DHCP_BINARY="neutron-dhcp-agent"
 NEUTRON_CONF_DIR=/etc/neutron
 NEUTRON_CONF=$NEUTRON_CONF_DIR/neutron.conf
 NEUTRON_META_CONF=$NEUTRON_CONF_DIR/metadata_agent.ini
+NEUTRON_META_DATA_HOST=${NEUTRON_META_DATA_HOST:-$(ipv6_unquote $SERVICE_HOST)}
 
 NEUTRON_DHCP_CONF=$NEUTRON_CONF_DIR/dhcp_agent.ini
 NEUTRON_L3_CONF=$NEUTRON_CONF_DIR/l3_agent.ini
@@ -296,7 +297,7 @@ function configure_neutron_new {
         cp $NEUTRON_DIR/etc/metadata_agent.ini.sample $NEUTRON_META_CONF
 
         iniset $NEUTRON_META_CONF DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL
-        iniset $NEUTRON_META_CONF DEFAULT nova_metadata_host $SERVICE_HOST
+        iniset $NEUTRON_META_CONF DEFAULT nova_metadata_host $NEUTRON_META_DATA_HOST
         iniset $NEUTRON_META_CONF DEFAULT metadata_workers $API_WORKERS
         # TODO(ihrachys) do we really need to set rootwrap for metadata agent?
         configure_root_helper_options $NEUTRON_META_CONF