handle HttpNodeJs request error

[josuigoa]

Without this change, the error thrown by the request must be handled with a generic

js.Node.process.on('uncaughtException', (e) -> trace(e));

I think is more convenient to handle the error with request.onError

[Simn]

I agree with this, but I don't know if it should add this "Http Request Error: " prefix...

[josuigoa]

No problem, should I remove the prefix entirely and only throw the 'e'? Or do you have something else in mind?

[Simn]

Closed by #12137