disable windows stats collection temporarily

Change-Id: I470b1735f80e48a65e2aef3df099fbdffbc4555f
Reviewed-on: http://review.couchbase.org/42681
Reviewed-by: Venu Uppalapati <venumahesh@gmail.com>
Tested-by: Venu Uppalapati <venumahesh@gmail.com>