qemu: Send event VIR_DOMAIN_EVENT_[STOPPED|STARTED] during recreation

qemu: Send event VIR_DOMAIN_EVENT_[STOPPED|STARTED] during recreation

For secure guest, FakeReboot kills original QEMU instance and
create new one which is quite different from normal guest.

To reflect this fact, VIR_DOMAIN_EVENT_[STOPPED|STARTED]
are sent to control plane with new introduced reasons
VIR_DOMAIN_EVENT_[STOPPED|STARTED]_RECREATION.

That would let control plane software understand that these
events are from a fake reboot.

Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>