MB-5311 Invoke notify_io_complete before releasing a connection.
MB-5311 Invoke notify_io_complete before releasing a connection.

notify_io_complete should be invoked for reserved connections
before releasing any of those connections.

Change-Id: I425c77bd3606626137ab01d03b45fe3fd362eee7
Reviewed-on: http://review.couchbase.org/16121
Reviewed-by: Jin Lim <c45cd80a556f432a3607171a6818cd5a074b5cd4@couchbase.com>
Tested-by: Chiyoung Seo <8b279095f11c26cc21045fda5a3e51debb005aa9@gmail.com>
Reviewed-on: http://review.couchbase.org/16127
Reviewed-by: Chiyoung Seo <8b279095f11c26cc21045fda5a3e51debb005aa9@gmail.com>

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