fix : aggregation issue in opensearch while searching in domain hierarchy #19594
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Describe your changes:
Fixes the below exception while searching domain hierarachy
Search for the domain in the Entity is failing, with the error
"An exception with message [Cannot invoke \"[os.org](http://os.org/).opensearch.search.aggregations.Aggregations.get(String)\" because the return value of \"[os.org](http://os.org/).opensearch.action.search.SearchResponse.getAggregations()\" is null] was thrown while processing request."
Type of change:
Checklist:
Fixes <issue-number>: <short explanation>