Update stage in task to auto retry upon 502 errors

[ngachung]

When testing stage in, we noticed some granules fail with

[
    {
        "error": "502 Server Error: Bad Gateway for url: https://data.gesdisc.earthdata.nasa.gov/data/CHIRP/SNDR13CHRP1.2/2021/032/SNDR.SS1330.CHIRP.20210201T0036.m06.g007.L1_J1.std.v02_48.G.200408101747.nc",
        "id": "G2031327806-GES_DISC"
    },
    {
        "error": "502 Server Error: Bad Gateway for url: https://data.gesdisc.earthdata.nasa.gov/data/CHIRP/SNDR13CHRP1.2/2021/032/SNDR.SS1330.CHIRP.20210201T0042.m06.g008.L1_J1.std.v02_48.G.200408101807.nc",
        "id": "G2031327773-GES_DISC"
    },
    {
        "error": "502 Server Error: Bad Gateway for url: https://data.gesdisc.earthdata.nasa.gov/data/CHIRP/SNDR13CHRP1.2/2021/032/SNDR.SS1330.CHIRP.20210201T0048.m06.g009.L1_J1.std.v02_48.G.200408101736.nc",
        "id": "G2031327751-GES_DISC"
    }
]

Subsequent download retries succeed.