CBQE-2462 since from 3.0.0 to 3.0.2, no master change.  So we don't need to take over master right when online upgrade from 3.0.0 to 3.0.2

Change-Id: I86d5bfb0c801492f64c1dddd78c420f5c182d41e
Reviewed-on: http://review.couchbase.org/42904
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>