Fix reserveHT

[splhack]

The nature of reserveHT is creating a CPU-list for taskset -c, it should work without Hyper-threading.
But it assumes hyperthreadingMultiplier is 2.
This PR allows non-HT machine (for example, VM) can use taskset -c.

(Probably, we can add an extra logic for hyperthreadingMultiplier=3 or more, but I think not worth it for now)

[bcipriano]

The change LGTM -- could you explain more what led you to make this change? I think I see the benefit of always using taskset, but I'd like to understand better.

[splhack]

The problem is this if logic in reserveHT to use taskset.

if hyperthreadingMultiplier > 1:

Current generation CPU cores' hyperthreadingMultiplier is always 2.
But it is not always true for VMs, etc.

[bcipriano]

What happens if taskset is not used?

[splhack]

taskset is here to launch the job command on the specified CPU lists by the CPU affinity.
Linux kernel schedules the process to run on any CPU without it.
It means RQD will lose the OpenCue concept, splitting machine into multiple computing resources for concurrent multiple job(frame, process.)

[splhack]

@bcipriano please let me know if anything I should clarify to merge.