message: Only show broker relist duration with duration relist behavior
diff: @@ -56,8 +56,10 @@ const ClusterServiceBrokerDetails: React.SFC<ClusterServiceBrokerDetailsProps> =
  </dd>
  <dt>Relist Behavior</dt>
  <dd>{serviceBroker.spec.relistBehavior}</dd>
  + {serviceBroker.spec.relistBehavior === 'Duration' && <React.Fragment>
  <dt>Relist Duration</dt>
  <dd>{serviceBroker.spec.relistDuration || '-'}</dd>
  + </React.Fragment>}
  </dl>
  </div>
  </div>
  