CBQE-1360 simplify windows installation capture file into single file

Change-Id: I82a55596cd136c22d0a01c79e9bd1ab626a63e7b
Reviewed-on: http://review.couchbase.org/27053
Tested-by: Thuan Nguyen <soccon@gmail.com>
Reviewed-by: Chisheng Hong <chisheng@couchbase.com>