fix commit/rollback markers

fix typos

Author: rekby

tests/aio/test_tx.py

@@ -149,7 +149,7 @@ async def check_transaction(s: ydb.aio.table.Session):
                 with pytest.raises(RuntimeError):
                     await tx.execute("INSERT INTO %s (id) VALUES (2)" % table_name)
 
-                tx.commit()
+                await tx.commit()
 
             async with s.transaction() as tx:
                 rs = await tx.execute("SELECT COUNT(*) as cnt FROM %s" % table_name)

ydb/table.py

@@ -2454,8 +2454,7 @@ def async_commit(self, settings=None):
 
         :return: A future of commit call
         """
-        self._check_split()
-        self._finished = True
+        self._set_finish(self._COMMIT)
 
         if self._tx_state.tx_id is None and not self._tx_state.dead:
             return _utilities.wrap_result_in_future(self)
@@ -2480,8 +2479,7 @@ def async_rollback(self, settings=None):
 
         :return: A future of rollback call
         """
-        self._check_split()
-        self._finished = True
+        self._set_finish(self._ROLLBACK)
 
         if self._tx_state.tx_id is None and not self._tx_state.dead:
             return _utilities.wrap_result_in_future(self)