config: Various tweaks to systemd setup
config: Various tweaks to systemd setup

This patch contains various tweaks to make systemd boot of DI more
reliable including, using "Requires" and "After" to make the
dependency clear, increasing the timeout for minion image pull, and
not daemonizing di-minion as that's systemd's responsibility.

kklin/kelda,LuiseV/quilt,secant/quilt,stevenlin598/quilt,NetSys/quilt,LuiseV/quilt,secant/quilt,akshayknarayan/quilt,tejasmanohar/quilt,kelda/kelda,tejasmanohar/quilt,mmussomele/quilt,PenguinToast/quilt,quilt/quilt,ZhongtianWang/quilt,ejj/quilt-dev,akshayknarayan/quilt,mmussomele/quilt,NetSys/quilt,NetSys/quilt,ejj/quilt-dev,kklin/kelda,NetSys/quilt,ZhongtianWang/quilt,PenguinToast/quilt,kklin/quilt,PenguinToast/quilt,ejj/quilt-dev,secant/quilt,kklin/quilt,stevenlin598/quilt,kelda/kelda,stevenlin598/quilt,mmussomele/quilt,mmussomele/quilt,LuiseV/quilt,mmussomele/quilt,PenguinToast/quilt,secant/quilt,kelda/kelda,ejj/quilt-dev,ZhongtianWang/quilt,akshayknarayan/quilt,ZhongtianWang/quilt,tejasmanohar/quilt,LuiseV/quilt,NetSys/quilt,kayousterhout/quilt,kklin/quilt,mmussomele/quilt,kayousterhout/quilt,kayousterhout/quilt,quilt/quilt,kklin/kelda,quilt/quilt,LuiseV/quilt,kklin/kelda,kklin/quilt,quilt/quilt,stevenlin598/quilt,secant/quilt,kayousterhout/quilt,kelda/kelda,PenguinToast/quilt,tejasmanohar/quilt,stevenlin598/quilt,stevenlin598/quilt,akshayknarayan/quilt