Request for review of PR: GEODE-9408: Avoid duplicate events sent by Serial Gateway Sender when group-transaction-events is true

[Alberto Gomez]

Hi,

I would like to request the review of the following PR:

https://github.com/apache/geode/pull/6663 (GEODE-9408: Avoid duplicate events 
sent by Serial Gateway Sender when group-transaction-events is true).

Thanks in advance,

Alberto