Apache Pinot

Hi :slightly_smiling_face: Working on integration testing for the purgeProcess implementation and looking for a way to set `SegmentZkMetada` my `lastPurgeTime` during the segment build using something like what have been done in `MergeRollupMinionClusterIntegrationTest` in the  `buildSegmentsFromAvroWithPostfix` method. Is there any way to put a metadata to the generated segment in order to validate my code ?

Answering my own question for reference

```//set up not passed delay
List&lt;SegmentZKMetadata&gt; segmentsZKMetadataDeltaNotPassed= _pinotHelixResourceManager.getSegmentsZKMetadata(tablenameOfflineNotPassed);
Map&lt;String,String&gt; customSegmentMetadataNotPassed = new HashMap&lt;&gt;();
customSegmentMetadataNotPassed.put(MinionConstants.PurgeTask.TASK_TYPE + MinionConstants.TASK_TIME_SUFFIX, String.valueOf(System.currentTimeMillis()-4000));
for (SegmentZKMetadata segmentZKMetadata : segmentsZKMetadataDeltaNotPassed) {
  segmentZKMetadata.setCustomMap(customSegmentMetadataNotPassed);
  _pinotHelixResourceManager.updateZkMetadata(tablenameOfflineNotPassed,segmentZKMetadata);
}```
