[ESRTEST-31237] Add the _source parameter to TopHits aggregation - #80

[reek] reported by reviewdog 🐶 UncommunicativeParameterName: JayAPI::Elasticsearch::QueryBuilder::Aggregations::TopHits#initialize has the parameter name '_source' [https://github.com/troessner/reek/blob/v6.5.0/docs/Uncommunicative-Parameter-Name.md] Raw Output: lib/jay_api/elasticsearch/query_builder/aggregations/top_hits.rb:32: UncommunicativeParameterName: JayAPI::Elasticsearch::QueryBuilder::Aggregations::TopHits#initialize has the parameter name '_source' [https://github.com/troessner/reek/blob/v6.5.0/docs/Uncommunicative-Parameter-Name.md]