Fix ingress traefik systemd unit
upstream https://review.opendev.org/#/c/705443/
In coreos we have selinux in enforcing. When the systemd unit does not have user and group, and the service type is not simple.
story: 2007210 task: 38609
Change-Id: Ia36a51e62b3dab97faf3ce58a218441bd93e77e9 Signed-off-by: Spyros Trigazis spyridon.trigazis@cern.ch