Allowing use of proxy with http streaming

[corinnekunze]

Hi,
We need to use streaming as well as through a proxy.

I noticed there wasn't functionality to do that but you have the ability to define proxy as a config when you initialize the LookerSDK::Client.

So I tapped into that so if a proxy variable is defined it'll try to use that with the Net::HTTP::Proxy class and chain it to the streaming request.

I've tested this in our app and it seems to be allowing the request through.

Not seeing any groundwork for testing of this StreamingClient though, that makes it difficult to write a test for this.

[dthorpe]

Hi Corrine,

Great! Thanks for looking into this and submitting the PR. I'll get someone to check this out shortly.

-Danny