fix in replication_while_rebooting_a_non_master_destination_node

Change-Id: Ie1eb3c621d180f624c97c4254a6882ec50cc4f42
Reviewed-on: http://review.couchbase.org/29601
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>