On add/remove node events, perform refresh of peers to the peers as per the
current set of active nodes. If a node is removed, delete the BGP nieghbor relation.
Fixes#14
by host name or FQDN. kubelet can be started with --hostname-override with configurable value.
In AWS envirinment typcally its set FQDN obtained from the metda data. This fix ensures
we can deploy kube-router in case nodes are registered with FQDN
Fixes#17