Add subscription-manager to tuned package installation
Add subscription-manager to tuned package installation

After [1], subscription-manager has been removed as requirement and that
has broken tuned automatic detection. Until there is a fix for that,
let's make sure subscription-manager is installed before starting tuned
service.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=2029405

Change-Id: I5b2e0c7bc4703bba31fd95f85ffbe8b2f270b163

rdo-infra/weirdo