[bgp]: Fix the deployment_id with DEVICE_METADATA (#962)

Author: Shuotian Cheng

dockers/docker-fpm-quagga/bgpd.conf.j2

@@ -94,7 +94,7 @@ router bgp {{ DEVICE_METADATA['localhost']['bgp_asn'] }}
 {% for bgp_peer in BGP_PEER_RANGE.values() %}
   neighbor {{ bgp_peer['name'] }} peer-group
   neighbor {{ bgp_peer['name'] }} passive
-  neighbor {{ bgp_peer['name'] }} remote-as {{deployment_id_asn_map[deployment_id] }}
+  neighbor {{ bgp_peer['name'] }} remote-as {{ deployment_id_asn_map[DEVICE_METADATA['localhost']['deployment_id']] }}
   neighbor {{ bgp_peer['name'] }} ebgp-multihop 255
   neighbor {{ bgp_peer['name'] }} soft-reconfiguration inbound
   neighbor {{ bgp_peer['name'] }} update-source Loopback0