Provide the peer snapshot for the incoming test owner

tests/test_etcp_stcp.c

@@ -326,6 +326,7 @@ static void callback_close_case(int reality, int side, unsigned action, unsigned
     }
     if (on_down) {
         wait_pair(); exchange_messages();
+        if (side == 1) import_peer(side);
         hold_connection(side); /* Входящий транспорт тоже имеет живого владельца при EOF. */
         test.retained = endpoints[side].conn;
         CHECK(etcp_conn_ref_take(test.retained) == 0);