qemu: blockjob: Always save status XML after block event
qemu: blockjob: Always save status XML after block event

The status XML would be saved only for the copy job (in case of success)
or on failure even for other jobs. As the status contains the backing
chain data, which change after success we should always save it on
block job completion.

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