CBQE-0: fix, data files were not collected if items counts mismtach but RevID matches

Change-Id: I5aa82bbc94f7ddf4da08a1b684c6b8f4e950f0cc
Reviewed-on: http://review.couchbase.org/37186
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>