MB-11725: trace capi updates a bit more

Change-Id: Iccb8d751ee2ebd3ad711eece48f25cbd72d3d381
Reviewed-on: http://review.couchbase.org/39374
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>