CBQE-0: added logs to debug MB-9707

Change-Id: Iccbe5594080417c97ebcfd020ae9900ebba84498
Reviewed-on: http://review.couchbase.org/32555
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>