rebase: upgrade snapshot v1beta1 api and clientset to v1 version

At present e2e snapshot code make use of snapshot v1beta1 api and client
This patch address the same and snapshot api clientset/apis are updated
to v1 version.

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/google.golang.org/grpc/clientconn.go

@@ -143,7 +143,6 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
 		firstResolveEvent: grpcsync.NewEvent(),
 	}
 	cc.retryThrottler.Store((*retryThrottler)(nil))
-	cc.safeConfigSelector.UpdateConfigSelector(&defaultConfigSelector{nil})
 	cc.ctx, cc.cancel = context.WithCancel(context.Background())
 
 	for _, opt := range opts {
@@ -1198,7 +1197,7 @@ func (ac *addrConn) resetTransport() {
 		ac.mu.Lock()
 		if ac.state == connectivity.Shutdown {
 			ac.mu.Unlock()
-			newTr.Close(fmt.Errorf("reached connectivity state: SHUTDOWN"))
+			newTr.Close()
 			return
 		}
 		ac.curAddr = addr
@@ -1330,7 +1329,7 @@ func (ac *addrConn) createTransport(addr resolver.Address, copts transport.Conne
 	select {
 	case <-time.After(time.Until(connectDeadline)):
 		// We didn't get the preface in time.
-		newTr.Close(fmt.Errorf("failed to receive server preface within timeout"))
+		newTr.Close()
 		channelz.Warningf(logger, ac.channelzID, "grpc: addrConn.createTransport failed to connect to %v: didn't receive server preface in time. Reconnecting...", addr)
 		return nil, nil, errors.New("timed out waiting for server handshake")
 	case <-prefaceReceived:
@@ -1447,9 +1446,10 @@ func (ac *addrConn) getReadyTransport() (transport.ClientTransport, bool) {
 }
 
 // tearDown starts to tear down the addrConn.
-//
-// Note that tearDown doesn't remove ac from ac.cc.conns, so the addrConn struct
-// will leak. In most cases, call cc.removeAddrConn() instead.
+// TODO(zhaoq): Make this synchronous to avoid unbounded memory consumption in
+// some edge cases (e.g., the caller opens and closes many addrConn's in a
+// tight loop.
+// tearDown doesn't remove ac from ac.cc.conns.
 func (ac *addrConn) tearDown(err error) {
 	ac.mu.Lock()
 	if ac.state == connectivity.Shutdown {