Error "networkNames must be a single item list when hostPort is specified and more than 1 container network is defined"

[Marc Roos]

I am getting this error message. When launching a task with portMappings 
and two container networks. What is the proper way to configure this?

general: networkNames must be a single item list when hostPort is 
specified and more than 1 container network is defined

  "networks": [ 
    { "mode": "container", "name": "cni-storage" },
    { "mode": "container", "name": "cni-apps-public", "labels": 
{"vendorid": "ext-testing"}}
  ],
  "container": {
    "type": "MESOS",
        "portMappings": [
      {"hostPort": 0, "name": "health", "protocol": "tcp"},
      {"hostPort": 0, "name": "metrics", "protocol": "tcp"}
    ]
  }

[1]
https://jira.d2iq.com/browse/MARATHON-8760