MB-10179: implemented CAPI _mass_vbopaque_check

Which is going to be used for periodic vbopaque checks. It's more or
less same as _pre_replicate but doing it for a bunch of vbuckets at
once for efficiency.

Change-Id: Idb9ea4509f02a07f91fc9eb1690acb530739eb24
Reviewed-on: http://review.couchbase.org/40360
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>