provide responseCode and response body along with error from "doAndRead" method

[saurabhkagrawal]

I am using go-uaa module to make uaa calls, but the calls like
GetClient, GetUser, CreateClient gives out generic error message "return errors.Errorf("An error occurred while calling %s", url)". This message is not enough to write code to react to it.
For example in my code to delete a "client" I want to inform the user that the "client" you are trying to delete does not exist, and not error out :).
But this is not possible if I do not know what is the returned response from UAA which is hidden by UAA Client in not so nice way.