39c99c0719
Related to: #8856 Many tests create their own `ThreadPoolTaskScheduler` beans. Therefore, its default phase might affect the memory and performance. * Use `phase = SmartLifecycle.DEFAULT_PHASE / 2` for manual `ThreadPoolTaskScheduler` beans * Migrate affected tests classes to JUnit 5 * Make some other configuration adjustments for better performance **Cherry-pick to `6.2.x`**