Array should be rendered same way as object

[srs]

Array should be rendered as is. This will not render right now:

exports.get = function () {
    return {
        body: [],
        contentType: 'application/json'
    };
}

[aro]

https://github.com/enonic/xp/commit/07714bd94aab624e3d8be4d07a09d2a20cb0edbb

[GlennRicaud]

Reviewed