ipatests: Fix incorrect order of operations when restoring backup
    
    When restoring files from backup, we do use an incorrect order of
    operations - we first restore SELinux context and then copy the
    files from backup, when we need to do the exact opposite.
    
    https://fedorahosted.org/freeipa/ticket/4133
    
    Reviewed-By: Jan Pazdziora <jpazdziora@redhat.com>