MB-10853: added upr stats to cbcollectinfo

Change-Id: I136c33ca3bebd2b6d62ce6047ff6610525e94737
Reviewed-on: http://review.couchbase.org/35707
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>