Darian Leung b1574fef2d freertos: Fix flakey event group unit test
The "FreeRTOS Event Groups" main task will only wait a single tick for the created
tasks to set their response bits. This short delay may not be sufficent if the tick
frequency is high.

This commit updates the test so that

- the main task waits indefinitely for all the response bits to be set.
- created tasks are cleand up by the main task
2022-07-19 12:03:04 +08:00
..
2021-09-09 11:54:47 +08:00