Log full transaction id too.

Because that's what happens in other places. So this change makes it
easier to correlate log messages.

Change-Id: I453ccf185d392f7102c9e7a042438ac3231a5b0f
Reviewed-on: http://review.couchbase.org/42803
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: John Liang <johliang00@gmail.com>