MB-11553 Reduce the min/default/max number of checkpoint items

This reverts commit af0f22545d9fd5f2ab675329de5d540ff5990c01.

It turns out that this change has nothing to do with view index
performance.

Change-Id: I416de3fbb125579cded468584e6ace98e1f34207
Reviewed-on: http://review.couchbase.org/39092
Reviewed-by: Chiyoung Seo <chiyoung@couchbase.com>
Tested-by: Chiyoung Seo <chiyoung@couchbase.com>