CBQE-2471 add support set vbuckets when install couchbase server on windows

Change-Id: Ica8d58354d3ffa68cb0d0568170ae1e15a50c341
Reviewed-on: http://review.couchbase.org/43096
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>