dracut-initqueue service runs before remote-fs-pre.target

With the following commit, dracut doesn't mount anything from /etc/fstab

commit e920bfb
Author: WANG Chao <chaowang@redhat.com>
Date:   Tue Apr 1 15:20:49 2014 +0800

    fstab: do not mount and fsck from fstab if using systemd

But systemd doesn't mount nfs at all, because no unit is pulling in
remote-fs.target.

dracut must pull in these remote fs mount and all these remote mounts
should start only after network is up (ie. after dracut-initqueue).

Signed-off-by: WANG Chao <chaowang@redhat.com>