接口地址：系统地址/RoadFlowCoreApi/FlowTask/GetWaitTasks

接口说明：查询待办事项列表

参数：{"systemcode":"系统标识","userid":"用户ID","pagesize":"每页显示多少条","pagenumber":"显示第几页"，"flowid":"流程ID","title":"任务标题","startdate":"开始时间","enddate":"结束时间","order":"排序"}

       flowid，title，startdate，enddate是查询条件，可以为空。order是排序字段，例：ReceiveTime DESC，就是按接收时间倒序排。

返回：{"errcode":0,"errmsg":"ok","data":[

    {

        "id":"任务id",

        "title":"任务标题",

        "flowid":"流程id",

        "flowname":"流程名称",

        "stepid":"步骤id",

        "instanceid":"业务数据表id",

        "groupid":"分组id",

        "stepname":"步骤名称",

        "senderid":"发送人id",

        "sendername":"发送人姓名",

        "receivetime":"接收时间",

        "completedtime":"要求完成时间",

        "status":"状态",

        "note":"备注"

    },....

]}