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.