code: protected String getContainerUrl() {
      String containerUrl = System.getProperty(CONTAINER_URL);
      if (containerUrl == null) {
        // fallback to look for a thread local variable. Only useful for testing
        // of JicUNit itself
        containerUrl = ContainerUrlHolder.get();
      }
      return containerUrl;
    }
docs: Retrieves the container from the system property
  {@link JicUnitRunner#CONTAINER_URL}.
  
  @return URL pointing to the container