Avoid forcing remote-fs-pre after network-online if possible.
    
    This change was discussed on devel@ (Re: "Improving Fedora boot
    time when libvirt is installed"). Currently, when iscsi.service
    is installed, it creates an ordering dependency that forces
    network-online to start before remote-fs-pre.target, which delays
    boot. This most commonly happens when virtualization support is
    installed, which means that boot takes longer for many users who
    aren't using iscsi.
    
    This will also require that the system preset change from
    iscsi.service to iscsi-starter.service.