Updates install guide with Horizon config information.

Updates with Grizzly and Havana info including new
integrated projects.

Updates to point to epel repo for RHEL/Fedora/Centos for
grizzly.

Updates to images where needed.

Fix bug 1154325
Fix bug 1154141

Change-Id: Id417de4241b4e8096949a0dd09985739c7a1deb6
Merge "Updates install guide with Horizon config information."