Update template for bastion (#3523)

Update template to have bastion section

contrib/terraform/aws/templates/inventory.tpl

@@ -2,8 +2,9 @@
 ${connection_strings_master}
 ${connection_strings_node}
 ${connection_strings_etcd}
+${public_ip_address_bastion}
 
-
+[bastion]
 ${public_ip_address_bastion}
 
 [kube-master]
@@ -24,4 +25,4 @@ kube-master
 
 
 [k8s-cluster:vars]
-${elb_api_fqdn}
\ No newline at end of file
+${elb_api_fqdn}