Fix leak while checking memory thresholds during warmup
Fix leak while checking memory thresholds during warmup

Change-Id: I13afce24fe325d334575d7d8e315ebe46aa23db7
Reviewed-on: http://review.couchbase.org/40085
Reviewed-by: Chiyoung Seo <fcffc23db27b19ee4ebba46695ee6b50e09216a2@couchbase.com>
Tested-by: Chiyoung Seo <fcffc23db27b19ee4ebba46695ee6b50e09216a2@couchbase.com>

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