code: private String getMetricsBaseUrl(String suppliedBaseUrl, String envBaseUrl) {
          
          String result = ("".equals(suppliedBaseUrl))? envBaseUrl : suppliedBaseUrl;
          logger.debug("getMetricsBaseUrl(env={}, supplied={}) = {}", envBaseUrl, suppliedBaseUrl, result);
          
          return result;
      }
docs: Return base url of the metrics endpoint of the Monitoring Platform.
  
  If an url is supplied in the request, use that value. Else, use MODACLOUDS_METRICS_URL env var is set.