Delete Resource Group fails with updatePollingState error

[weinong]

Bug Report

• import path of package in question, e.g. .../services/compute/mgmt/2018-06-01/compute
services/resources/mgmt/2018-05-01/resources though, its more like a bug in github.com/Azure/go-autorest/autorest/azure/async.go
• SDK version e.g. master, latest, 18.1.0
  • Specify the exact commit if possible; one way to get this is the REVISION
    column output by dep status "github.com/Azure/azure-sdk-for-go.

$ dep status "github.com/Azure/azure-sdk-for-go"
PROJECT                            CONSTRAINT  VERSION   REVISION  LATEST    PKGS USED
github.com/Azure/azure-sdk-for-go  v20.1.0     v20.1.0   2935c02   v20.1.0   2
github.com/Azure/go-autorest       ^10.15.3    v10.15.3  a35eae3   v10.15.3  8
github.com/dgrijalva/jwt-go        v3.2.0      v3.2.0    06ea103   v3.2.0    1

• output of go version

$ go version
go version go1.10.4 windows/amd64

• What happened?
  In some scenario ARM would not follow the typical Async behavior, e.g. returning operation status indicating the state. Instead, it returns ServiceError directly. When this happens, the SDK failed with pollingTrackerBase#updatePollingState: the response from the async operation has an invalid status code: StatusCode=0. This is extremely undesired as detail is lost.
• What did you expect or want to happen?
  At least the response needs to be returned in the error object.
• How can we reproduce it?
  I captured the response from ARM. You can repro from https://github.com/weinong/azure-sdk-for-go-bug
• Anything we should know about your environment.

[jhendrixMSFT]

Fixed in https://github.com/Azure/go-autorest/releases/tag/v10.15.4