vz: fixes: snapshot: s/parent/parent_name/ as prep for virObject
vz: fixes: snapshot: s/parent/parent_name/ as prep for virObject

Apply renaming of 36603bc56 for the vz driver.

Signed-off-by: Nikolay Shirokovskiy <7fa0e2698a05be944b362bdf5d7736c0162e16c9@virtuozzo.com>

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