MB-100: refreshed rebalance confs

Change-Id: I66ac0fbd3038b6dfc8d8b51bd867de9d6ee47879
Reviewed-on: http://review.couchbase.org/24006
Reviewed-by: Ronnie Sun <ronnie@couchbase.com>
Tested-by: Ronnie Sun <ronnie@couchbase.com>