MB-11940: added cbstats runtimes to cbcollectinfo stats

Change-Id: I0602b88758e2639a5da660816016d7885f9b40d0
Reviewed-on: http://review.couchbase.org/40550
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>