VOL-1845 : Support for delete device in openolt adapter

           This commit is for the handling of delete device.

           The changes are done to handle the request for delete
           device. This includes the clearing of all data related
           to the device in KV store and reboot of device to reset
           the device.

           This commit has dependency in voltha-go so that needs to
           be merged first. Please refer this review link
           https://gerrit.opencord.org/#/c/15084/

           Updated to dep ensure above voltha-go patch set.  Also typo
           and make lint/sca fixes.

Change-Id: I53f16022c6902d498dad30e9b7d0ff50bf156347
diff --git a/vendor/golang.org/x/net/http2/transport.go b/vendor/golang.org/x/net/http2/transport.go
index c0c80d8..c51a73c 100644
--- a/vendor/golang.org/x/net/http2/transport.go
+++ b/vendor/golang.org/x/net/http2/transport.go
@@ -992,7 +992,7 @@
 		req.Method != "HEAD" {
 		// Request gzip only, not deflate. Deflate is ambiguous and
 		// not as universally supported anyway.
-		// See: http://www.gzip.org/zlib/zlib_faq.html#faq38
+		// See: https://zlib.net/zlib_faq.html#faq39
 		//
 		// Note that we don't request this for HEAD requests,
 		// due to a bug in nginx:
@@ -1216,6 +1216,8 @@
 
 	// abort request body write, but send stream reset of cancel.
 	errStopReqBodyWriteAndCancel = errors.New("http2: canceling request")
+
+	errReqBodyTooLong = errors.New("http2: request body larger than specified content length")
 )
 
 func (cs *clientStream) writeRequestBody(body io.Reader, bodyCloser io.Closer) (err error) {
@@ -1238,10 +1240,32 @@
 
 	req := cs.req
 	hasTrailers := req.Trailer != nil
+	remainLen := actualContentLength(req)
+	hasContentLen := remainLen != -1
 
 	var sawEOF bool
 	for !sawEOF {
-		n, err := body.Read(buf)
+		n, err := body.Read(buf[:len(buf)-1])
+		if hasContentLen {
+			remainLen -= int64(n)
+			if remainLen == 0 && err == nil {
+				// The request body's Content-Length was predeclared and
+				// we just finished reading it all, but the underlying io.Reader
+				// returned the final chunk with a nil error (which is one of
+				// the two valid things a Reader can do at EOF). Because we'd prefer
+				// to send the END_STREAM bit early, double-check that we're actually
+				// at EOF. Subsequent reads should return (0, EOF) at this point.
+				// If either value is different, we return an error in one of two ways below.
+				var n1 int
+				n1, err = body.Read(buf[n:])
+				remainLen -= int64(n1)
+			}
+			if remainLen < 0 {
+				err = errReqBodyTooLong
+				cc.writeStreamReset(cs.ID, ErrCodeCancel, err)
+				return err
+			}
+		}
 		if err == io.EOF {
 			sawEOF = true
 			err = nil