Discard unfixed and unaffected vulnerabilities in Red Hat OVAL v2 feed

Red Hat Product Security team is planning to released new format of OVAL v2 data, where unfixed and unaffected vulnerabilities will include <affected_cpe_list> section. This will make libvun process such entries. At this point, we want to discard both kidns of entries as soon as we encounter them.

• Unaffected vulnerabilities will be discarded even in the future, as from point of security scanning they offer no value
• Unfixed vulnerabilities will be processed in the future patch