MB-100: increase connection_timeout for queries

Change-Id: Ie59dc7467f4d69aa140f400e09ef81fac0b39ab1
Reviewed-on: http://review.couchbase.org/25031
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>