camelCase playerID in logs (#2041)
camelCase playerID in logs (#2041)

To be consistent with other logs, as they seem to be using `playerID`
instead of `PlayerID`.
googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones