Save retrofit strategy query parameters

[longshuicy]

Create maestro services endpoints POST & GET to store relation between retrofit strategy dataset_id and conditions generated that dataset.

{
    "total": {
        "num_bldg": 3283,
        "num_bldg_no_cost": 42,
        "cost": 117260721.43
    },
    "by_rule": {
        "0": {
            "num_bldg": 3191,
            "num_bldg_no_cost": 40,
            "cost": 94393478.73
        },
        "1": {
            "num_bldg": 90,
            "num_bldg_no_cost": 0,
            "cost": 22867242.7
        },
        "2": {
            "num_bldg": 2,
            "num_bldg_no_cost": 2,
            "cost": 0
        }
    }
}