rebased tuned to latest upstream
resolves: rhbz#1944643
realtime: disabled kvm.nx_huge_page kernel module option in
realtime-virtual-host profile
resolves: rhbz#1976825
realtime: explicitly set 'irqaffinity=~<isolated_cpu_mask>' in kernel
command line
resolves: rhbz#1974820
scheduler: added abstraction for the sched_* and numa_* variables which
were previously accessible through the sysctl
resolves: rhbz#1952687
recommend: fixed wrong profile on ppc64le bare metal servers
resolves: rhbz#1959889