fix: Fixed issue with _keyspace population

sdk/python/feast/infra/online_stores/contrib/cassandra_online_store/cassandra_online_store.py

@@ -352,6 +352,7 @@ def online_write_batch(
                       display progress.
         """
         project = config.project
+        session: Session = self._get_session(config)
 
         keyspace: str = self._keyspace
         fqtable = CassandraOnlineStore._fq_table_name(keyspace, project, table)
@@ -383,6 +384,7 @@ def unroll_insertion_tuples() -> Iterable[Tuple[str, bytes, str, datetime]]:
 
         self._write_rows_concurrently(
             config,
+            session,
             unroll_insertion_tuples(),
         )
         # correction for the last missing call to `progress`:
@@ -498,9 +500,9 @@ def _fq_table_name(keyspace: str, project: str, table: FeatureView) -> str:
     def _write_rows_concurrently(
         self,
         config: RepoConfig,
+        session: Session,
         batches: Iterable[BatchStatement],
     ):
-        session: Session = self._get_session(config)
         futures = []
         for batch in batches:
             futures.append(session.execute_async(batch))