Bugs fix from bupt

• Add management interface (Collect ueip information)
  Description: This interface is used to collect the ueip list.
  URI:{apiRoot}/openxg-smf/v1/uemsg
  Method：GET
  For example:
  Request: curl -X GET http://127.0.0.1:80/openxg-smf/v1/uemsg
  Response:

{
    "code": 200,
    "data": [
        {
            "ueip": "192.169.0.3",
            "timestamp": "2022-02-25 16:31:22",
            "imsi": "466920000000002"
        },
        {
            "ueip": "192.169.0.4",
            "timestamp": "2022-02-25 16:31:22",
            "imsi": "466920000000001"
        }
    ],
    "msg": "success"
}