PYCBC-136: Pass quiet from Couchbase.connect

Change-Id: I26435289fbc0e68e94a3c668ae9e0a412fe6857b
Reviewed-on: http://review.couchbase.org/26984
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: Mordechai Nunberg <mnunberg@haskalah.org>