Rather than passing in a string object, I think we can pass in the RestUtil parameters object here.

e.g.:
```javascript
var getOrcidRecordByIdentifier = module.exports.getOrcidRecordByIdentifier = function(restCtx, parameters, callback) {
    RestUtil.RestRequest(restCtx, '/api/orcid/search', 'GET', parameters, callback);
};
```

We would be able to use this as such:
```javascript
RestAPI.OrcId.getOrcidRecordByIdentifier(restCtx, {'id': '0001-32223-232-'}, function(err, data) { .. });

// or

RestAPI.OrcId.getOrcidRecordByIdentifier(restCtx, {'email': 'foo@bar.com'}, function(err, data) { .. });
```