CBQE-0: remove verify_src variable

Change-Id: I0b5deae59f8b176ad2314375bf9ecd40ac1854ce
Reviewed-on: http://review.couchbase.org/41136
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>