Revert default behavior to 'always on' streaming mode

Config cache will still used 'timed' connections which linger

Change-Id: I6c78fb915d332392ee76692d13bd1f88a8c2c734
Reviewed-on: http://review.couchbase.org/34957
Reviewed-by: Matt Ingenthron <matt@couchbase.com>
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>