Add tests for getString() and getDictionary()

[helenmasters]

There are currently no tests for either cloudEnv.getDictionary(name: String) or cloudEnv.getString(name: String) we should add these in.

[petershaw]

Maybe this is why it does not work for me?

this is my .config:

{
    "PORT": 8090,
    "cmsurl": "http://localhost:8080",
    "cms": {
        "foo": 1
    }
}

Changing the port works beautiful, but

        let dict = cloudEnv.getDictionary(name: "cms")
        dump(dict)
        print( cloudEnv.getString(name: "cmsurl") )

turns out as:

- nil
nil

am I doing in wrong, or is it broken?