Add Metrics

[trippinnik]

We have been using the defaults but recently wanted the add scsilun.queueDepth:

https://developer.vmware.com/apis/358/vsphere/doc/vim.host.ScsiLun.html

Looking at the already listed metrics looks I put in host section:

{
      "ObjectType": [ "HostSystem" ],
      "Definition": [
        { "Metric": "disk.maxTotalLatency.latest", "Instances": "" },
        { "Metric": "disk.numberReadAveraged.average", "Instances": "*" },
        { "Metric": "disk.numberWriteAveraged.average", "Instances": "*" },
        { "Metric": "scsilun.queueDepth.latest", "Instances": ""}
      ]
    }
  ]

the last line is what we added with no joy. Also tried that with "Instance":"*"

How do we line up the API documentation with adding these to the config file?