Fixing retrybackoff changes made in core (#159)

* Fixing retrybackoff changes made in core

* Updating Go modules

Author: jtopjian

client/client.go

@@ -364,7 +364,7 @@ func FormatJSON(raw []byte) (string, error) {
 	return string(pretty), nil
 }
 
-func RetryBackoffFunc(logger Logger) gophercloud.RetryFunc {
+func RetryBackoffFunc(logger Logger) gophercloud.RetryBackoffFunc {
 	return func(ctx context.Context, respErr *gophercloud.ErrUnexpectedResponseCode, e error, retries uint) error {
 		retryAfter := respErr.ResponseHeader.Get("Retry-After")
 		if retryAfter == "" {

go.mod

@@ -1,7 +1,7 @@
 module github.com/gophercloud/utils
 
 require (
-	github.com/gophercloud/gophercloud v0.15.1-0.20210202035223-633d73521055
+	github.com/gophercloud/gophercloud v0.20.0
 	github.com/hashicorp/go-uuid v1.0.2
 	github.com/mitchellh/go-homedir v1.1.0
 	golang.org/x/sys v0.0.0-20201119102817-f84b799fce68

go.sum

@@ -1,5 +1,7 @@
 github.com/gophercloud/gophercloud v0.15.1-0.20210202035223-633d73521055 h1:/wFA5WAzWcHNjpUs/Vuf4g2Sbv0wj3MUkZdeYgU4RkI=
 github.com/gophercloud/gophercloud v0.15.1-0.20210202035223-633d73521055/go.mod h1:wRtmUelyIIv3CSSDI47aUwbs075O6i+LY+pXsKCBsb4=
+github.com/gophercloud/gophercloud v0.20.0 h1:1+4jrsjVhdX5omlAo4jkmFc6ftLbuXLzgFo4i6lH+Gk=
+github.com/gophercloud/gophercloud v0.20.0/go.mod h1:wRtmUelyIIv3CSSDI47aUwbs075O6i+LY+pXsKCBsb4=
 github.com/hashicorp/go-uuid v1.0.2 h1:cfejS+Tpcp13yd5nYHWDI6qVCny6wyX2Mt5SGur2IGE=
 github.com/hashicorp/go-uuid v1.0.2/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
 github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=