core: Remove image configuration check on disk move/copy

Since the destination format type is determined by VDSM, there is no reason
to check whether the image to be moved/copied configration is supported by
the destination domain

Change-Id: Ic774155b0811faf8607f735f19f9b785cf15e610
Signed-off-by: Tal Nisan <tnisan@redhat.com>
Bug-Url: https://bugzilla.redhat.com/1063996