Lists containing maps should have `type="map"` defined for Terrafom

[lig]

actual

        "asset_name__var_name": {
            "type": "list",
            "default": [
                {
                    "foo": "abc",
                    "bar": "xyz"
                }
            ]
        }

expected

        "asset_name__var_name": {
            "type": "map",
            "default": [
                {
                    "foo": "abc",
                    "bar": "xyz"
                }
            ]
        }