Fix session closing

src/sakia/data/connectors/bma.py

@@ -215,7 +215,7 @@ class BmaConnector:
                             else:
                                 answers[data_hash].append(node)
         finally:
-            await session.close()
+            session.close()
 
         if len(answers_data) > 0:
             if request is bma.wot.lookup:

src/sakia/data/connectors/node.py

@@ -136,8 +136,7 @@ class NodeConnector(QObject):
             else:
                 closed = True
             await asyncio.sleep(0)
-        await self.session.close()
-        await asyncio.sleep(0)
+        self.session.close()
 
     def refresh(self, manual=False):
         """