@Override
  public int hashCode() {
    int result = clusterId != null ? clusterId.hashCode() : 0;
    result = 31 * result + (requestId != null ? requestId.hashCode() : 0);
    result = 31 * result + (stageId != null ? stageId.hashCode() : 0);
    result = 31 * result + (requestContext != null ? requestContext.hashCode() : 0);
    return result;
  }
sets display status for the stage
@param displayStatus {@link HostRoleStatus}
ambari-server/src/main/java/org/apache/ambari/server/orm/entities/StageEntity.java