MB-15769: In notifyStreamReady() check if bufferlog is full within queueLock
MB-15769: In notifyStreamReady() check if bufferlog is full within queueLock

Change-Id: I02436648a6c9df1c832ee1d8dce78c12f0693d2f
Reviewed-on: http://review.couchbase.org/53441
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Chiyoung Seo <fcffc23db27b19ee4ebba46695ee6b50e09216a2@couchbase.com>

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