conf: properly translate iscsi-direct storage pool
conf: properly translate iscsi-direct storage pool

We cannot simply used the same code as for iscsi storage pool because
the default mode is 'host' which is not possible with iscsi-direct.

Reviewed-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>
Signed-off-by: Pavel Hrdina <d4772d05997b8abf035041e3b4f4996380ea7e7a@redhat.com>

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