code: static Class<?> getDeploymentClass(ArquillianDescriptor descriptor) {
          Class<?> deploymentClass = getDeploymentClassFromConfig(descriptor);
          if (deploymentClass == null) {
              deploymentClass = getDeploymentClassFromAnnotation();
          }
          if (deploymentClass == null) {
              log.warning("arquillian-suite-deployment: Cannot find configuration in arquillian.xml, nor class annotated with @ArquillianSuiteDeployment, will try standard way..");
          }
          return deploymentClass;
      }
docs: Finds class to be used as global deployment.
  
  @param descriptor ArquillianDescriptor
  @return class to be used as global deployment.