core: osinfo - add unsupported list of CPUs

adding a comma separated list of unsupported CPUs to osinfo
and 2 verbs to query it:

  public Map<Pair<Integer, Version>, Set<String>> getUnsupportedCpus();

  public boolean isCpuSupported(int osId,  Version version, String cpuId);

Change-Id: I339b87de7646b813aa634102c26f710b9d5f6f75
Bug-Url: https://bugzilla.redhat.com/1096851
Signed-off-by: Roy Golan <rgolan@redhat.com>