p.haul: remove pidfile manipulations in VZ module
p.haul: remove pidfile manipulations in VZ module

Virtuozzo don't hold containers root task pid in pidfile, this
information can be acquired using cgroups instead. So we don't need
to create pidfile on destination side during restore.

Signed-off-by: Nikita Spiridonov <e2c2785991de10f66b050593578d4296c6c8705d@odin.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>

arthurlockman/p.haul,jne100/p.haul,xemul/p.haul,arthurlockman/p.haul,xemul/p.haul,jne100/p.haul,xemul/p.haul,aburluka/p.haul,jne100/p.haul,marcosnils/p.haul,aburluka/p.haul,marcosnils/p.haul,aburluka/p.haul,arthurlockman/p.haul,aburluka/p.haul,xemul/p.haul,arthurlockman/p.haul,jne100/p.haul,aburluka/p.haul,jne100/p.haul,marcosnils/p.haul,arthurlockman/p.haul,xemul/p.haul