Comment 5 for bug 1684622

No code change is needed, the cluster json needs to have the following added:

“provision”: {
    “contrail_4”: {
         “controller_config”: {
              "external_routers_list": { “r1": “192.168.0.1", “r2": “192.168.0.2", “r3": “192.168.0.3”}
          }
    }
}