MB-12268: Adding a debug log, when clusterConfig is updated
MB-12268: Adding a debug log, when clusterConfig is updated

Change-Id: I0cbb70789f84bddc644bdc4ee59c1e86e1821220
Reviewed-on: http://review.couchbase.org/41746
Reviewed-by: Sundararaman Sridharan <333a3f71d3ad6e01fc953c4fa06bc1f3cd014910@couchbase.com>
Tested-by: abhinav dangeti <d73ef2279de6577f7bf081737ee47554bbb7dc82@couchbase.com>
Reviewed-on: http://review.couchbase.org/41824
Reviewed-by: abhinav dangeti <d73ef2279de6577f7bf081737ee47554bbb7dc82@couchbase.com>

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