获取警报阈值

列出单个警报阈值的属性。

请求示例：

GET /api/alert/v1/thresholds/1b15d405-75c4-4c0c-e0f6-8a108165b874
    HTTP/1.1
Authorization: Basic abcd123MWE=
Host: zfssa.example.com:215
Accept: application/json

结果示例：

HTTP/1.1 200 OK
X-Zfssa-Appliance-Api: 1.0
Content-Type: application/json
Content-Length: 363

{
    "threshold": {
        "days": "weekdays",
        "frequency": 300,
        "href": "/api/alert/v1/thresholds/
                 1b15d405-75c4-4c0c-e0f6-8a108165b874",
        "limit": 100000,
        "minclear": 300,
        "minpost": 300,
        "statname": "datalink.kilobytes",
        "type": "normal",
        "uuid": "1b15d405-75c4-4c0c-e0f6-8a108165b874",
        "window_end": 0,
        "window_start": -1
    }
}