[Gameplay] Afk surrender ignores kills

Team abused afk surrender, down 3 (including fb) - 1 in kills they were still granted a remake.

This was a significant lead to our team that had nothing to do with the afk, though it may have been an abuse where the opposing team went in hard once 1 person triggered the surrender vote to see if they could either give themselves a lead or surrender the game if it failed. Kills came in slow enough before the surrender that they happened before it was confirmed but quick enough that someone likely started the surrender vote before-hand.

http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2276002158/46052171?tab=overview

What should happen is when a player from the surrendering team is killed the surrender should be voided to prevent abuse (setting up a surrender than "going ham" for a lead and deciding whether to surrender or not based on the success/failure of that play).