qemu: hotplug: Validate that vcpu-hotplug does not break config
qemu: hotplug: Validate that vcpu-hotplug does not break config

Make sure that non-hotpluggable vcpus stay clustered at the beginning
after modifying persistent definition.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1437010

VenkatDatta/libvirt,zippy2/libvirt,andreabolognani/libvirt,libvirt/libvirt,crobinso/libvirt,zippy2/libvirt,datto/libvirt,jardasgit/libvirt,jfehlig/libvirt,crobinso/libvirt,andreabolognani/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,libvirt/libvirt,crobinso/libvirt,fabianfreyer/libvirt,eskultety/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,jardasgit/libvirt,eskultety/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,crobinso/libvirt,eskultety/libvirt,zippy2/libvirt,VenkatDatta/libvirt,datto/libvirt,eskultety/libvirt,datto/libvirt,datto/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,olafhering/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,zippy2/libvirt,datto/libvirt,VenkatDatta/libvirt,eskultety/libvirt,nertpinx/libvirt,andreabolognani/libvirt,nertpinx/libvirt,libvirt/libvirt,olafhering/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,jfehlig/libvirt,olafhering/libvirt,jardasgit/libvirt,jardasgit/libvirt,jfehlig/libvirt,libvirt/libvirt,olafhering/libvirt