Tuned 2.9 introduces automatic and manual profile selection.
If there is a file /etc/tuned/profile_mode containing "manual"
on a system with tuned 2.9, without this PR the appropriate OCP
profiles will not be set.  This PR removes the file prior to
tuned restart, in addition to /etc/tuned/active_profile to
make the tuned profile selection automatic.

We set these variables using facts in init, no need
to duplicate the logic all around the codebase.

Currently, profiles for the tuned daemon are set only for
OpenShift node(s).  This excludes the OpenShift loadbalancer.
As a result, ARP cache limits on loadbalancers are not raised.
This causes problems with HA setups where loadbalancers serve
1k+ OpenShift nodes.

This commit ensures the openshift-control-plane role is applied
to loadbalancers, masters and OpenShift infra nodes.  Regular
OpenShift worker nodes get the openshift-node profile.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1498213