Re-enabling n1ql querying.

Change-Id: Ib1e115186900d69a1075f5637e347c30df195182
Reviewed-on: http://review.couchbase.org/40335
Reviewed-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>