MB-10400 notifier open upr connection and stream_request commands

Change-Id: I0a3bea32d0cba0ad6cea355d451cd2977a2df799
Reviewed-on: http://review.couchbase.org/34453
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>