private RepositorySetting parseRepositorySetting(Map<String, String> setting){
    RepositorySetting result = new RepositorySetting();
    result.setOperatingSystem(setting.get(RepositorySetting.OPERATING_SYSTEM));
    result.setOverrideStrategy(setting.get(RepositorySetting.OVERRIDE_STRATEGY));
    result.setRepoId(setting.get(RepositorySetting.REPO_ID));
    result.setBaseUrl(setting.get(RepositorySetting.BASE_URL));
    return result;
  }
Parse stack repo info stored in the blueprint_settings table
@return set of repositories
ambari-server/src/main/java/org/apache/ambari/server/topology/BlueprintImpl.java