Major Description
The "Test Connection" feature allows us to validate the configurations mentioned for that particular service.
If "Test Connection" is not implemented for a particular service definition, which means that the service definition specific implementation is not created which handles the configuration validation.
If this is the case, then RangerDefaultService is used and the API GET service/plugins/services/validateConfig sends the below response
{"statusCode":1,"msgDesc":"","messageList":[{"message":""}]}
We should send an user-friendly message in this case, indicating that "Configuration validation is not implemented" for that particular service.