Validator - Missing details of schema violations

[noursaidi]

Validator output files no longer include details on schema violation errors

Old .out:

While converting to json node: 1 schema violations found
  1 schema violations found
    object instance has properties which are not allowed by the schema: ["device_id","topic"]

New .out:

{
  "timestamp" : "2022-08-02T19:32:59Z",
  "version" : "1.3.14",
  "sub_folder" : "system",
  "status" : {
    "message" : "While converting to json node: 1 schema violations found",
    "category" : "validation.error.simple",
    "level" : 500
  }
}

[noursaidi]

Fixed by #439