tests: Lower retry timeout to 5s

No need to poll every second, there's going to be some latency
here and we want to avoid the overhead of polling.

Closes: #1548
Approved by: cgwalters

tests/installed/execute_batch.yml

@@ -20,3 +20,4 @@
   register: async_poll_results
   until: async_poll_results.finished
   retries: 500
+  retry_pause: 5