upgrade kvproto to the latest master

Signed-off-by: Ryan Leung <rleungx@gmail.com>

client/client.go

@@ -121,8 +121,8 @@ type Client interface {
 	// GetOperator gets the status of operator of the specified region.
 	GetOperator(ctx context.Context, regionID uint64) (*pdpb.GetOperatorResponse, error)
 
-	// LoadGlobalConfig gets the global config from etcd
-	LoadGlobalConfig(ctx context.Context, configPath string) ([]GlobalConfigItem, error)
+	// TODO: add LoadGlobalConfig back with new implementation
+
 	// StoreGlobalConfig set the config from etcd
 	StoreGlobalConfig(ctx context.Context, items []GlobalConfigItem) error
 	// WatchGlobalConfig returns an stream with all global config and updates
@@ -347,8 +347,6 @@ var (
 	errClosing = errors.New("[pd] closing")
 	// errTSOLength is returned when the number of response timestamps is inconsistent with request.
 	errTSOLength = errors.New("[pd] tso length in rpc response is incorrect")
-	// errGlobalConfigNotFound is returned when etcd does not contain the globalConfig item
-	errGlobalConfigNotFound = errors.New("[pd] global config not found")
 )
 
 // ClientOption configures client.
@@ -1822,29 +1820,6 @@ func trimHTTPPrefix(str string) string {
 	return str
 }
 
-// TODO: complete this function with new implementation.
-func (c *client) LoadGlobalConfig(ctx context.Context, configPath string) ([]GlobalConfigItem, error) {
-	resp, err := c.getClient().LoadGlobalConfig(ctx, &pdpb.LoadGlobalConfigRequest{ConfigPath: configPath})
-	if err != nil {
-		return nil, err
-	}
-	res := make([]GlobalConfigItem, len(resp.GetItems()))
-	for i, item := range resp.GetItems() {
-		cfg := GlobalConfigItem{Name: item.GetName()}
-		if item.Error != nil {
-			if item.Error.Type == pdpb.ErrorType_GLOBAL_CONFIG_NOT_FOUND {
-				cfg.Error = errGlobalConfigNotFound
-			} else {
-				cfg.Error = errors.New("[pd]" + item.Error.Message)
-			}
-		} else {
-			cfg.Value = item.GetValue()
-		}
-		res[i] = cfg
-	}
-	return res, nil
-}
-
 func (c *client) StoreGlobalConfig(ctx context.Context, items []GlobalConfigItem) error {
 	resArr := make([]*pdpb.GlobalConfigItem, len(items))
 	for i, it := range items {