Converted plugins/dmi to Mixlib::ShellOut.
Converted plugins/kernel to Mixlib::ShellOut.
Converted plugins/rackspace to Mixlib::ShellOut.
Convert plugins/solaris2/dmi to Mixlib::ShellOut.
Converted plugins/solaris2/filesystem to Mixlib::ShellOut.
Converted plugins/solaris2/hostname to Mixlib::ShellOut.
Converted plugins/solaris2/kernel to Mixlib::ShellOut.