New compute/cpu_shared_set nova config can be set via parameter
NovaComputeCpuSharedSet.
Some workloads run best when the hypervisor overhead processes
(emulator threads in libvirt/QEMU) can be placed on different
physical host CPUs than other guest CPU resources. This allow
those workloads to prevent latency spikes for guest vCPU threads.
A list or range of physical CPU cores to reserve for for best-
effort guest vCPU resources (e.g. emulator threads in libvirt/QEMU)
can be specified.
Closes-Bug: 1776905
Change-Id: I53c567e8eeef12d582205b6e2d8310635555b5b8
780d0e5f97