Update header/footer of SSO server pages to fit new wider range of microsites

As number of microsites under jboss.org domain increases, and they have other brandings/layouts/information architecture in some cases, we have to upgrade header/footer of SSO server pages to fit this better, to be more neutral.
We should at least:

• remove navigation links (GET STARTED, GET INVOLVED, PROJECTS, PRODUCTS) from header part
• add some 'Red Hat' note (at least some logo and link in footer)