CBQE-0 add missing import class

Change-Id: Iacb8857a314cdfa93d1df921e95ba69b7b8579e0
Reviewed-on: http://review.couchbase.org/34124
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>