Use QTRY_COMPARE with a timeout to check for the stopped state
unless BAD_TIMER_RESOLUTION is defined.
This speeds up the test by 1s and prints diagnostic information
should an interval be too short (as seems to be the case on macOS,
currently).
Change-Id: I8f884cd66ad33314124d3130d9f49606e6dfe9f3
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@qt.io>