Use the Dcp noop interval for dcp connections

We were accidentally using the tap noop interval.

Change-Id: Ib7d6615d3128095e8f29a12afa1922961f5aa197
Reviewed-on: http://review.couchbase.org/40994
Reviewed-by: abhinav dangeti <abhinav@couchbase.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>