CBQE-2368 fix windows install automation in 2.x.x

Change-Id: I3e1d491f8edeb06c0db63cacc5811062cd864617
Reviewed-on: http://review.couchbase.org/40383
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>