Box primitive values

[jumpinjackie]

For APIs that return primitive values, we need to box the result to provide consistency in expected response structure. Primitive values can neither be expressed in XML or JSON without boxing.

For such values, they should be boxed in XML like so:

<PrimitiveValue>
    <Type>boolean</Type>
    <Value>true</Value>
</PrimitiveValue>

The JSON equivalent being:

{
    "PrimitiveValue": {
        "Type": "boolean"
        "Value": true
    }
}