Increased pubsub's wait_for_messages timeout to prevent flaky tests (#1893)

Author: barshaul

tests/test_pubsub.py

@@ -12,7 +12,7 @@
 from .conftest import _get_client, skip_if_redis_enterprise, skip_if_server_version_lt
 
 
-def wait_for_message(pubsub, timeout=0.1, ignore_subscribe_messages=False):
+def wait_for_message(pubsub, timeout=0.5, ignore_subscribe_messages=False):
     now = time.time()
     timeout = now + timeout
     while now < timeout: