Capacity Scheduler preemption is not enabled by default in HDP. Enabling it affects the entire cluster and LLAP is of concern in the bug.
- Add a validation check about CS preemption configuration, while LLAP is not enabled.
If CS preemption is enabled, no validation check required.
-> Also, uncommenting and fixing the test code in test_stack_advisor::test_validateHiveInteractiveSiteConfigurations().