private static void injectDefaults(Configuration configuration, Set<String> configTypesUpdated, Collection<String> services) {
    setRetryConfiguration(configuration, configTypesUpdated);
    setupHDFSProxyUsers(configuration, configTypesUpdated, services);
  }
Ensures that properties non-stack properties are present in {@code configuration}.
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/BlueprintConfigurationProcessor.java