[DISCUSS] KIP-177 Consumer perf tool should count rebalance time

[Hu Xi]

Hi all, I opened up a new 
KIP<https://cwiki.apache.org/confluence/display/ARIES/KIP-177%3A+Consumer+perf+tool+should+count+rebalance+time>
 (KIP-177) concerning consumer perf tool counting and showing rebalance time in 
the output. Be free to leave your comments here. Thanks in advance.