reducing autocommit fires when consumer is idle (#568)
reducing autocommit fires when consumer is idle (#568)

in `HighLevelConsumer.updateOffsets` autoCommit was being called
regardless if the connected topics were updated or not, causing
autocommit to be called frequently with the same offsets already in
place
SOHU-Co/kafka-node,SOHU-Co/kafka-node,SOHU-Co/kafka-node