Fix document JSON export

{
  "_baseOptions": {
    "repositoryName": "default",
    "schemas": [
      "*"
    ],
    "enrichers": {
      "document": [
        "acls",
        "permissions"
      ]
    },
    "fetchProperties": {},
    "headers": {
      "X-NXDocumentProperties": "*",
      "X-NXRepository": "default",
      "enrichers-document": "acls,permissions",
      "Nuxeo-Transaction-Timeout": 30000,
      "Accept": "application/json"
    },
    "timeout": 30005
  },
  "_nuxeo": {
    "_baseOptions": {
      "repositoryName": "default",
      "schemas": [],
      "enrichers": {},
      "fetchProperties": {},
      "headers": {},
      "timeout": 30000
    },
    "_baseURL": "http://localhost:8080/nuxeo/",
    "_restURL": "http://localhost:8080/nuxeo/api/v1/",
    "_automationURL": "http://localhost:8080/nuxeo/api/v1/automation/",
    "_auth": null,
    "connected": false,
    "_activeRequests": 0
  },
...