close pool on driver close

Author: vgvoleg

ydb/aio/driver.py

@@ -59,3 +59,7 @@ def __init__(
         self.scheme_client = scheme.SchemeClient(self)
         self.table_client = table.TableClient(self, config.table_client_settings)
         self.topic_client = topic.TopicClientAsyncIO(self, config.topic_client_settings)
+
+    async def stop(self, timeout=10):
+        await self.table_client._pool.stop(timeout)
+        await super().stop(timeout=timeout)

ydb/driver.py

@@ -282,3 +282,7 @@ def __init__(
         self.scheme_client = scheme.SchemeClient(self)
         self.table_client = table.TableClient(self, driver_config.table_client_settings)
         self.topic_client = topic.TopicClient(self, driver_config.topic_client_settings)
+
+    def stop(self):
+        self.table_client._pool.stop()
+        super().stop()