CBQE-0 add DCP rebalance/monitor in offline upgrade

Change-Id: Ife4be35bc5cffd79db0bd1d957dc6a5da55eaccb
Reviewed-on: http://review.couchbase.org/41412
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>