[VOTE] KIP-937: Improve Message Timestamp Validation

[Beyene, Mehari]

Hello everyone,

I am opening the Volte on KIP-937 here. If we have more to discuss, please 
continue the discussion on the existing thread at: 
https://lists.apache.org/thread/wdpw845q9f5rhf6tz9tdlx3kc1g5zczc

Thank you,
Mehari