Foreman » Packaging

Set HOME to ~foreman as rb-readline requires it

fixes #7970 - add and prefer /usr/bin/foreman-ruby symlink

Use foreman-ruby for bundle calls especially, so it allows the default Ruby
to vary separately from Foreman's. Set foreman-ruby to ruby1.9.1 explicitly
on Ubuntu 12.04.

refs #7572 - package foreman_host_rundeck plugin