fixes #3855 - pin ruby-libvirt to 0.4 for Ruby 1.8 workaround
Fixes #3838: Adds ability to define a divider when declaring a menu item
from a plugin.
fixes #3790 - Added support for isolated engine to foreman menu
Fixes #3753 - always use main_app to determine paths for running an isolated namespace plugin
fixes #3539 - removed legacy mysql adapter
refs #3067 - domain stripped from installation media hostname for Solaris
Fixes #3720 - Add description field to operatingsystem
Fixes #3721 - Map OS family to a display variant