Increase sleep duration in Kafka consumer test for readiness stability

Author: dbotwinick

tests/test_tkvt_kafka.py

@@ -32,7 +32,7 @@ async def consumer(t, k, v, ts):
     await broker.consumer_loop_async(blocking=False)
 
     # Wait for consumer to be ready
-    await asyncio.sleep(2.0)
+    await asyncio.sleep(5.0)
 
     # Publish message
     timestamp = now()