Revert "MB-4269: vb_active_ht_memory reports incorrect value"
Revert "MB-4269: vb_active_ht_memory reports incorrect value"

This reverts commit c9f32309157e26201d52a5e3477e18823cf832fb.

Change-Id: I35b97a091d8ec39a3ca4e2d823ce2679458a1247
Reviewed-on: http://review.couchbase.org/11161
Reviewed-by: Chiyoung Seo <8b279095f11c26cc21045fda5a3e51debb005aa9@gmail.com>
Tested-by: Chiyoung Seo <8b279095f11c26cc21045fda5a3e51debb005aa9@gmail.com>

membase/ep-engine,hisundar/ep-engine,teligent-ru/ep-engine,owendCB/ep-engine,abhinavdangeti/ep-engine,membase/ep-engine,daverigby/kv_engine,jimwwalker/ep-engine,teligent-ru/ep-engine,couchbase/ep-engine,owendCB/ep-engine,teligent-ru/ep-engine,hisundar/ep-engine,daverigby/kv_engine,abhinavdangeti/ep-engine,membase/ep-engine,couchbaselabs/ep-engine,daverigby/kv_engine,daverigby/ep-engine,owendCB/ep-engine,couchbaselabs/ep-engine,daverigby/ep-engine,hisundar/ep-engine,couchbase/ep-engine,sriganes/ep-engine,owendCB/ep-engine,couchbaselabs/ep-engine,daverigby/ep-engine,abhinavdangeti/ep-engine,abhinavdangeti/ep-engine,jimwwalker/ep-engine,daverigby/ep-engine,membase/ep-engine,couchbase/ep-engine,hisundar/ep-engine,daverigby/kv_engine,teligent-ru/ep-engine,sriganes/ep-engine,sriganes/ep-engine,abhinavdangeti/ep-engine,couchbase/ep-engine,couchbaselabs/ep-engine,jimwwalker/ep-engine,sriganes/ep-engine,jimwwalker/ep-engine,couchbaselabs/ep-engine