Log DCP stream creation before closing the stream
Log DCP stream creation before closing the stream

Th endStream() function emits a log message saying the stream was
closed. This log message should always come after the one that says
the stream was created.

Change-Id: Ibcd259373f5675cf49ea7a95ba3f2276507abe7a
Reviewed-on: http://review.couchbase.org/56615
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Chiyoung Seo <fcffc23db27b19ee4ebba46695ee6b50e09216a2@couchbase.com>

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