Fix for SitestreamController.getInfo(streamId,userId)

I removed the userId parameter as the twitter documentation does not have such a parameter (see https://dev.twitter.com/docs/streaming-apis/streams/site/control#info). Additionally, the info.json endpoint is an HTTP GET, not a post, and the userId is not actually used by the current code. Lastly, because HttpContants.constructRequest does not sign get requests, all info requests failed. HttpConstants.constructRequests now sign both POST and GET requests if auth is passed.