public void setUpgradeSummary(UpgradeSummary upgradeSummary) {
    this.upgradeSummary = upgradeSummary;
  }
Sets the upgrade summary if there is an active upgrade in the cluster.

@param upgradeSummary
         the upgrade or {@code null} for none.
ambari-server/src/main/java/org/apache/ambari/server/agent/ExecutionCommand.java