feat(rest): update response API Listing users

[tuannn2]

Issue: #1994

How To Test?

• Run command line:

$ curl 'https://sw360.org/api/users' -i -X GET \
    -H 'Authorization: Bearer eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsic3czNjAtUkVTVC1BUEkiXSwidXNlcl9uYW1lIjoiYWRtaW5Ac3czNjAub3JnIiwic2NvcGUiOlsiYWxsIl0sImV4cCI6MTY4NjMwNzk2NSwiYXV0aG9yaXRpZXMiOlsiUkVBRCIsIldSSVRFIl0sImp0aSI6Inp6ang3YXhKSWZWT3FMSFBRTTdldWhicjQwWSIsImNsaWVudF9pZCI6InRydXN0ZWQtc3czNjAtY2xpZW50In0.GN0qYkxZ4_DccOHcjBCmFFuNdRhGZbL1HLl9XRCIX-VvhfuP9E8xpoj8FyPtKN6PQZoFRWDyGlB7YUDf0h3CpOTIhf2dL5sH2p6lnYviM-1rhqCb4iePqrLokwCvtKGYTlzSlfqeFt5YvKgRnwO8LI4mS73d1mCJ8anOZHoJHAMGp5URtRcxG5ZZEk7xJGI2EzM0li5pXjkbmI6qibdieXdakv9TLLtH0R_NQMNZYZxEaZiNXDDCvPEVk_YoYVB31LQJRRyO3xzl_T9r9iKOQObMACiXBz4ETME-sXK9wzpDlTl4ufy2pKX18ok6t_yO8nJ8vPpFnItF6W_nuRoaOA' \
    -H 'Accept: application/hal+json'

• Expected Output:

{
  "_embedded" : {
    "sw360:users" : [ {
      "email" : "admin@sw360.org",
      "department" : "SW360 Administration",
      "deactivated" : false,
      "fullName" : "John Doe",
      "givenName" : "John",
      "lastName" : "Doe",
      "_links" : {
        "self" : {
          "href" : "https://sw360.org/api/users/byid/4784587578e87989"
        }
      }
    }, {
      "email" : "jane@sw360.org",
      "department" : "SW360 BA",
      "deactivated" : false,
      "fullName" : "Jane Doe",
      "givenName" : "Jane",
      "lastName" : "Doe",
      "_links" : {
        "self" : {
          "href" : "https://sw360.org/api/users/byid/frwey45786rwe"
        }
      }
    } ]
  },
  "_links" : {
    "curies" : [ {
      "href" : "https://sw360.org/docs/{rel}.html",
      "name" : "sw360",
      "templated" : true
    } ]
  }
}

[nikkuma7]

Test successful.

[rudra-superrr]

Why create new method when you can add the new fields in the above method(convertToEmbeddedUser)?

[tuannn2]

When I add new fields in method(convertToEmbeddedUser) it causes redundancy for about 11APIs using that function. It's not really necessary.

[rudra-superrr]

Code looks good.