Disallow copying of flusher.
Disallow copying of flusher.

Change-Id: Idbf16d4a7ebcac3d5edf8891e77529811931853f
Reviewed-on: https://review.northscale.com:8443/1325
Reviewed-by: Sean Lynch <9c3328a4a1f4f8f5c18b2d5b9057163c49b93ff3@literati.org>
Tested-by: Sean Lynch <9c3328a4a1f4f8f5c18b2d5b9057163c49b93ff3@literati.org>

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