CBLT-42:  s3cmd --no-progress --config=c:\Users\Administrator\s3cmd.ini

This is so that job can run as local service account, but be set up by Administrator.

Change-Id: I2fb489d41b69b927ecbd9380271d8976841b7ea6
Reviewed-on: http://review.couchbase.org/37394
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>