@Override
    public Map<String, String> getProvisionProperties() {
      return ImmutableMap.of(
        SKIP_INSTALL_FOR_COMPONENTS,        FOR_ALL_COMPONENTS,
        DO_NOT_SKIP_INSTALL_FOR_COMPONENTS, FOR_NO_COMPONENTS,
        CLUSTER_PHASE_PROPERTY,             CLUSTER_PHASE_INITIAL_INSTALL
      );
    }
This special step is used for START_ONLY services/components, because state
transition cannot skip INSTALLED in the INIT -> INSTALLED -> STARTED sequence.
ambari-server/src/main/java/org/apache/ambari/server/topology/ProvisionStep.java