Missing "ops.XXXAuth" usage on requests

[laurentstemmermd]

It seems like you are missing auth: opts.sourceAuth or auth: opts.targetAuth each time http.request is performed. So it's not possible to use the exporter with basic auth without fixing it manualy.

http.request({
            host : opts.sourceHost,
            port : opts.sourcePort,
            auth: opts.sourceAuth,

[laurentstemmermd]

I opened a PR #53