corrected error throw in case of incorrect auth type for MLE

Author: monu-kumar-visa

lib/AuthenticationSDK/core/MerchantConfig.rb

@@ -266,7 +266,7 @@ def validateMLEConfiguration
       if mle_configured && !Constants::AUTH_TYPE_JWT.eql?(@authenticationType)
         err = StandardError.new(Constants::ERROR_PREFIX + "MLE can only be used with JWT authentication")
         @log_obj.logger.error(ExceptionHandler.new.new_api_exception err)
-        raise
+        raise err
       end
     end