Use katello-configure-foreman-proxy instead of foreman-proxy-installer

Foreman-proxy-installer package is deprecated. Instead, foreman
upstream pupped modules in combination with katello-configure script
is used.
Dashboard: Allowing users to rearrange dashboard widgets

Added drag-and-drop to the widgets in the UI, made them all the same size, and
created a way to store the layout in the user's preferences so that when they
revisit the dashboard, it's the same layout.
Merge pull request #2500 from daviddavis/dashboard-tweaks

Dashboard: Allow users to rearrange widgets
Merge pull request #2502 from iNecas/katello-configure-foreman-proxy

Use katello-configure-foreman-proxy instead of foreman-proxy-installer
Packaging: Adding in dashboard Ruby code
Merge pull request #2510 from daviddavis/temp/1371559208

Packaging: Adding in dashboard Ruby code