MB-10789: [3] Bloom filter use is configurable

Also add the residency threshold paramter which
will be used in the full eviction scenario only.

2 parameters dynamically configurable with cbepctl:
    - bfilter_enabled
    - bfilter_residency_threshold

Change-Id: I7348ae125365d0ec67918fe295fc76d41a24813a
Reviewed-on: http://review.couchbase.org/41859
Reviewed-by: Chiyoung Seo <chiyoung@couchbase.com>
Tested-by: abhinav dangeti <abhinav@couchbase.com>