Parameter Validation doesn't handle empty array

[carolynvs]

The new version looks very good! The example above is working now. I've found one more problem though when trying to define an array parameter with a specific schema for the items:

parameters:
  - name: values
    type: array
    items:
      type: integer

This builds successfully but trying to install it with the following parameters:

{
  "parameters": [
    {
      "name": "values",
      "source": {
        "value": "[]"
      }
    }
  ]
}

I get the following error message:

Error: 1 error occurred:
	* encountered error while validating parameter values: unable to load schema: json: unsupported type: map[interface {}]interface {}


Error: 1 error occurred:
	* container exit code: 1, message: <nil>

But besides that it is working pretty well. Good job!

Originally posted by @cy-ddg in #1459 (comment)

[carolynvs]

Duplicate of #1738