public UpgradeActionOperations setConfigurationChanges(
      ConfigurationChanges configurationChanges) {
    setConfigurationChanges(Collections.singletonList(configurationChanges));
    return this;
  }
Sets configuration changes which are a part of the actions to be performed
during the upgrade for a single configuration type only. If multiple
configuration types are being updated, then
{@link #setConfigurationChanges(List)} should be used.

@param configurationChanges
         the configuration changes to make.
@return an instance of the {@link UpgradeActionOperations} with the value
        set.
@see #setConfigurationChanges(List)
ambari-server-spi/src/main/java/org/apache/ambari/spi/upgrade/UpgradeActionOperations.java