virsh migrate: Fix positional parameters
virsh migrate: Fix positional parameters

Thanks to our smart option parser which automatically assigns positional
parameters the following (previously working) command fails:

    virsh migrate test qemu+ssh://1.2.3.4/system tcp://1.2.3.4/
    error: invalid argument: Unsupported compression method
    'tcp://1.2.3.4/'

We need to make sure new options are added at the end of the list rather
than where they logically belong.

Reported by Brian Rak.

Signed-off-by: Jiri Denemark <62bdf77dc47919a4d59a91822129d14633cfca81@redhat.com>

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