vendor: update all dependencies to latest versions

vendor/github.com/Azure/go-autorest/autorest/retriablerequest.go

@@ -7,18 +7,6 @@ import (
 	"net/http"
 )
 
-// NOTE: the GetBody() method on the http.Request object is new in 1.8.
-//       at present we support 1.7 and 1.8 so for now the branches specific
-//       to 1.8 have been commented out.
-
-// RetriableRequest provides facilities for retrying an HTTP request.
-type RetriableRequest struct {
-	req *http.Request
-	//rc    io.ReadCloser
-	br    *bytes.Reader
-	reset bool
-}
-
 // NewRetriableRequest returns a wrapper around an HTTP request that support retry logic.
 func NewRetriableRequest(req *http.Request) *RetriableRequest {
 	return &RetriableRequest{req: req}
@@ -29,49 +17,22 @@ func (rr *RetriableRequest) Request() *http.Request {
 	return rr.req
 }
 
-// Prepare signals that the request is about to be sent.
-func (rr *RetriableRequest) Prepare() (err error) {
-	// preserve the request body; this is to support retry logic as
-	// the underlying transport will always close the reqeust body
-	if rr.req.Body != nil {
-		if rr.reset {
-			/*if rr.rc != nil {
-				rr.req.Body = rr.rc
-			} else */if rr.br != nil {
-				_, err = rr.br.Seek(0, io.SeekStart)
-			}
-			rr.reset = false
-			if err != nil {
-				return err
-			}
+func (rr *RetriableRequest) prepareFromByteReader() (err error) {
+	// fall back to making a copy (only do this once)
+	b := []byte{}
+	if rr.req.ContentLength > 0 {
+		b = make([]byte, rr.req.ContentLength)
+		_, err = io.ReadFull(rr.req.Body, b)
+		if err != nil {
+			return err
 		}
-		/*if rr.req.GetBody != nil {
-			// this will allow us to preserve the body without having to
-			// make a copy.  note we need to do this on each iteration
-			rr.rc, err = rr.req.GetBody()
-			if err != nil {
-				return err
-			}
-		} else */if rr.br == nil {
-			// fall back to making a copy (only do this once)
-			b := []byte{}
-			if rr.req.ContentLength > 0 {
-				b = make([]byte, rr.req.ContentLength)
-				_, err = io.ReadFull(rr.req.Body, b)
-				if err != nil {
-					return err
-				}
-			} else {
-				b, err = ioutil.ReadAll(rr.req.Body)
-				if err != nil {
-					return err
-				}
-			}
-			rr.br = bytes.NewReader(b)
-			rr.req.Body = ioutil.NopCloser(rr.br)
+	} else {
+		b, err = ioutil.ReadAll(rr.req.Body)
+		if err != nil {
+			return err
 		}
-		// indicates that the request body needs to be reset
-		rr.reset = true
 	}
+	rr.br = bytes.NewReader(b)
+	rr.req.Body = ioutil.NopCloser(rr.br)
 	return err
 }