[VOTE] KIP-1143: Deprecated Optional and return String from public Endpoint#listenerName

[PoAn Yang]

Hi all,

I would like to start a vote on KIP-1143. Thank you.

KIP: https://cwiki.apache.org/confluence/x/LwqWF

Discussion thread: 
https://lists.apache.org/thread/1967vwhhy34lcjmcd0lfk6p5k6chj8rq

Regards,
PoAn