@JsonInclude(JsonInclude.Include.NON_EMPTY)
  @JsonProperty("host_overrides")
  public List<HostOverride> getHostOverrides() {
    return hostOverrides;
  }
Gets the host overrides for the desired config.  Cluster-based desired configs only.
@return the host names that override the desired config
ambari-server/src/main/java/org/apache/ambari/server/state/DesiredConfig.java