[VOTE] FLIP-495: Support AdaptiveScheduler record and query the rescale history

[Yuepeng Pan]

Hi all, Thanks for all the feedback on FLIP-495[1][2]. I'd like to start a vote 
for FLIP-495. The vote will last for at least 72 hours unless there is an 
objection or insufficient votes. Thanks, Yuepeng Pan [1] 
https://cwiki.apache.org/confluence/display/FLINK/FLIP-495:+Support+AdaptiveScheduler+record+and+query+the+rescale+history
 [2] https://lists.apache.org/thread/t3r9wdd5gpbqnvzw35kb3wb3d9brpnon