http command removes initial query parameters

[railscard]

When I'm executing service http method using url with query values, HttpCommand completely replaces those query values with empty hash.

For example when I'm using this http method to download files using the export links from google drive, instead of this:

Sending HTTP get https://docs.google.com/feeds/download/documents/export/Export?id=someDocumentId&exportFormat=docx

I get this

Sending HTTP get https://docs.google.com/feeds/download/documents/export/Export?

I think it's not very convenient, so we should keep initial query parameters.
If you agree, I can make a PR (railscard@f51a4f2)

[sqrrrl]

PR welcome. Please make sure to read the contributing guidelines and sign the CLA too.