fix fetch ncwms metadata

[NekoLyn]

example NCWMS layer call:

/collections/79c8eea2-4e86-4553-8237-4728e27abe10/items/wms_layers

res:

    {
        "queryable": "0",
        "name": "sstaars_daily_fit_url/TEMP",
        "title": "sstaars_daily_fit_url/TEMP",
        "ncWmsLayerInfo": {
            "units": "degrees_Celsius",
            "bbox": [
                -180,
                -69.98999786376953,
                180,
                19.989999771118164
            ],
            "palettes": [
                "rainbow",
                "occam",
                "redblue",
                "ncview",
                "sst_36",
                "greyscale",
                "occam_pastel-30",
                "alg2",
                "ferret",
                "alg"
            ],
            "defaultPalette": "rainbow",
            "scaleRange": [
                -1.6,
                32.8
            ],
            "datesWithData": {
                "2005": {
                    "0": [
                        22,
                        23,
                        24,
                        25,
                        26,
                        27,
                        28,
                        29,
                        30,
                        31,
                        10,
                        11,
                        12,
                        13,
                        14,
                        15,
                        16,
                        17,
                        18,
                        19,
                        1,
                        2,
                        3,
                        4,
                        5,
                        6,
                        7,
                        8,
                        9,
                        20,
                        21 ... ...
                    ]
                }
            },
            "numColorBands": 253,
            "supportedStyles": [
                "boxfill",
                "contour"
            ],
            "moreInfo": "",
            "timeAxisUnits": "ISO8601",
            "nearestTimeIso": "2005-12-31T00:00:00.000Z",
            "logScaling": false
        }
    }
]

[shaunahu]

LGTM