[RHEVM3] Include SSG logo into generated HTML guide if underlying system oscap version supports it
[RHEVM3] Align initial form of <front-matter> element in RHEVM3's guide.xml
         to match the form as present in RHEL/*
[OpenStack] Include SSG logo into generated HTML guide if underlying system oscap version supports it
[OpenStack] Align initial form of the <front-matter> element in OpenStack's guide.xml
            to match the form as present in RHEL/*