CBQE-2164: disable sasl on pre-merge view tests

Change-Id: Icea67cb9a05ef45aa726b3295acd8a32dffa662a
Reviewed-on: http://review.couchbase.org/35140
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>
Tested-by: Ketaki Gangal <ketakigangal@gmail.com>