[#239] morph/client: Recreate actor/wrappers in SetGroupSignerScope

That's the reason #2230 and #2263 were not detected earlier, we actually had
Global scope being used before reconnection to RPC node.

Signed-off-by: Roman Khimov <roman@nspcc.ru>
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

CHANGELOG.md

@@ -65,6 +65,7 @@ Changelog for FrostFS Node
 - Parts of a locked object could not be removed anymore (#141)
 - Non-alphabet nodes do not try to handle alphabet events (#181)
 - Failing SN and IR transactions because of incorrect scopes (#2230, #2263)
+- Global scope used for some transactions (#2230, #2263)
 
 ### Removed
 ### Updated

pkg/morph/client/nns.go

@@ -208,10 +208,18 @@ func (c *Client) SetGroupSignerScope() error {
 		return err
 	}
 
-	c.cfg.signer = &transaction.Signer{
+	// Don't change c before everything is OK.
+	cfg := c.cfg
+	cfg.signer = &transaction.Signer{
 		Scopes:        transaction.CustomGroups | transaction.CalledByEntry,
 		AllowedGroups: []*keys.PublicKey{pub},
 	}
+	rpcActor, err := newActor(c.client, c.acc, cfg)
+	if err != nil {
+		return err
+	}
+	c.cfg = cfg
+	c.setActor(rpcActor)
 	return nil
 }